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Technical Information 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 SICK 
 AFS60 / AFM60 PROFINET 
 Function Block 
 
 
 
 
 
FB_SICK_AFx60_PN function block 
for Siemens S7-300 / S7-400 PLCs 
(SIMATIC STEP7 V5) 
 
Technical Information 
FB_SICK_AFx60_PN 
Function Block 
 
 
 
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Version history 
Block 
Version 
Date Remark 
V1.0 03.05.2016 Initial version 
V1.1 08.03.2017 Change the unit of the PROFINET parameters 1002.1 and 1003.1 
from [0,1h] to [s]. No code changes (only documentation) 
 
 
Table of content 
1 About this document ........................................................................................................ 3 
1.1 Function of this document ............................................................................................ 3 
1.2 Target group ................................................................................................................ 3 
2 General information ......................................................................................................... 4 
3 Hardware Configuration ................................................................................................... 5 
3.1 Supported PLCs .......................................................................................................... 5 
3.2 Hardware configuration ................................................................................................ 5 
4 Function block .................................................................................................................. 6 
4.1 Block specifications ...................................................................................................... 6 
4.2 Renaming of block numbers ........................................................................................ 6 
4.3 Method of function ....................................................................................................... 7 
4.3.1 Read data .............................................................................................................11 
4.3.2 Write data .............................................................................................................12 
4.4 Behavior when error occurs ........................................................................................12 
5 Parameter .........................................................................................................................13 
6 Error description .............................................................................................................14 
7 Example ...........................................................................................................................16 
7.1 Read a device a parameter .........................................................................................17 
7.2 Write a device parameter ............................................................................................18 
Technical Information 
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Function Block 
 
 
 
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1 About this document 
Please read this chapter carefully before you start working with this technical information and 
the FB_SICK_AFx60_PN function block. 
 
1.1 Function of this document 
This technical information describes how to use the FB_SICK_AFx60_PN function block. It is 
used for guiding technical personnel working for the machine manufacturer / operator in pro-
ject planning and commissioning. 
 
1.2 Target group 
This technical information is aimed for specialists, such as technicians and engineers. 
 
 
 
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Function Block 
 
 
 
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2 General information 
The function block “FB_SICK_AFx60_PN” simplifies the use of the AFS60 / AFM60 encoder 
on Siemens S7-300 / S7-400 PLCs. The device has to be embedded into the PROFINET 
surrounding of your PLC-Controller. 
 
 
 
Figure 1 shows the concept behind the AFx602 PLC integration. 
 
Figure 1: Concept behind the AFX60 PN function block 
The function block makes it possible to read and write a defined set of device parame-
ters (PNU = Parameter number) via PROFINET. 
 
Device parameters: 
- [PNU 922] Telegram Number (Read only) 
- [PNU 964] Device Identification (Read only) 
- [PNU 965] Encoder Profile-Number (Read only) 
- [PNU 971] EEPROM Storage (Read/Write) 
- [PNU 975] Object Identification (Read only) 
- [PNU 979] Sensor Format (Read only) 
- [PNU 980] Parameter List (Read only) 
- [PNU 1000] Encoder Status Flag (Read only) 
- [PNU 1001] Device Status Flag (Read only) 
- [PNU 1002] Service-Log History Absolut (Read only) 
- [PNU 1003] Service-Log History Relative (Read only) 
- [PNU 1004] Service-Log Errors (Read only) 
- [PNU 1005] Speed Calculation (Read only) 
- [PNU 1006] Temperature Limits (Read/Write) 
- [PNU 1007] Voltage Limits (Read/Write) 
- [PNU 1009] Scaling Parameters (Read only) 
- [PNU 1010] Operation Test (Read/Write) 
- [PNU 1011] MAC-ID Port 1 (Read only) 
- [PNU 1012] MAC-ID Port 2 (Read only) 
- [PNU 1013] Firmware version (Read only) 
- [PNU 1014] Temperature (Read only) 
- [PNU 61000] Station Name (Read only) 
- [PNU 61001] Station IP (Read only) 
- [PNU 61002] Station MAC-ID (Read only) 
- [PNU 61003] Station Gateway (Read only) 
- [PNU 61004] Station Subnet (Read only) 
- [PNU 65000] Preset Value (Read/Write) 
- [PNU 65001] Operating Status (Read only) 
FB_SICK_AFx60_PN 
Acyclic 
PROFINET 
communication 
DB_SICK_ 
AFx60_DATA 
Instance 
Data 
SFB53
WRREC 
SFB52 
RDREC 
Function block (FB77) 
Data block (DB77) 
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Function Block 
 
 
 
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3 Hardware Configuration 
3.1 Supported PLCs 
The function block can only be used with S7-300 / S7-400 PLCs which can be programmed 
with SIMATIC STEP7 V5.x. Communication processor cards (CP-Modules) are not support-
ed by the function block. 
3.2 Hardware configuration 
Before the function block can be used, the SICK device has to be projected in the hardware 
configuration in STEP7. Therefore the corresponding device file (GSD file) has to be import-
ed in the hardware library of the STEP7 engineering tool. 
 
Figure 2 shows an example projecting of a SICK AFS60A (PROFINET) device. Please use 
diagnostic address of the “Parameter Access Point” sub-module for the #ID parameter of the 
function block. 
 
 
Figure 2: Example hardware configuration 
 
 
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Function Block 
 
 
 
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4 Function block 
The FB_SICK_AFx60_PN function block simplifies the usage of a SICK AFS60 / AFM60 en-
coder. The FB allows transmitting and receiving of device specific service data via acyclic 
PROFINET services. The usage of a communication processor (CP-Module) is not support-
ed by this function block. 
 
The function block is working asynchronously, which means the processing is done via vari-
ous function block call ups. Therefore it is necessary that the function block is called up cycli-
cally in the user program. 
 
The function block encapsulates the Siemens functions RDREC (SFB52) and WRREC 
(SFB53), which are used for the acyclic communication between the PLC and AFx60 device. 
 
 
Figure 3: FB_SICK_AFx60_PN function block 
 
4.1 Block specifications 
Block name: FB_SICK_AFx60_PN (FB77) 
Version: 1.1 
Called up PLC blocks: TON (SFB 4) 
 RDREC (SFB52) 
 WRREC (SFB53) 
Data blocks: DB_SICK_AFx60_DATA (DB74) 
Function block call up: Cyclically 
Used flags: no 
Language: Instruction list (IL) 
STEP7 Version: STEP7 V5.5 + SP3 
 
4.2 Renaming of block numbers 
In general, all block numbers are changeable. 
 
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4.3 Method of function 
The function block uses thedata block (DB) DB_SICK_AFx60_DATA to handle data. This 
DB includes all parameters which are needed to exchange service data with an AFX60 de-
vice. 
 
The data block includes two structures called “ParameterSelection” and “Parameter”. The 
“ParameterSelection” structure determines which variables should be read or written when 
the FB is triggering at the #Req input bit. 
 
 Please note! 
 
Further information about the encoder parameters and their limitations, see 
device documentation. 
 
 
 
Figure 4: “ParameterSelection” structure of the "DB_SICK_AFx60_DATA" DB 
 
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Figure 5: “Parameter” structure of the "DB_SICK_AFx60_DATA" DB [Part 1/4] 
 
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Figure 6: “Parameter” structure of the "DB_SICK_AFx60_DATA" DB [Part 2/4] 
 
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Figure 7: “Parameter” structure of the "DB_SICK_AFx60_DATA" DB [Part 3/4] 
 
 
Figure 8: “Parameter” structure of the "DB_SICK_AFx60_DATA" DB [Part 4/4] 
 
 
 Attention! 
 
Please do not change or edit the addressing of the data block 
“DB_SICK_AFx60_DATA” variables. Otherwise it cannot be ensured that the 
function block works correctly. 
 
 
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4.3.1 Read data 
Before reading out sensor parameters a selection is needed. This selection determines 
which parameters should be read out from sensor (ParameterSelection). 
 
Figure 9 shows an example to read out the temperature limits [PNU 1006] and the voltage 
limits [PNU 1007]. 
 
Figure 9: Read out the temperature- and voltage limits [Part 1/2] 
 
 
Figure 10: Read out the temperature- and voltage limits [Part 2/2] 
 
The reading action starts by calling up the FB with a positive trigger (signal change from 
FALSE to TRUE) at the #Req input bit. The #RW bit must be set to FALSE (read access). As 
long as there is no valid answer the output #Busy is TRUE. In case the timeout period is ex-
cited, a time out error will be generated and the thread will be terminated. The #Done 
(=TRUE) output shows that the transmission was successful. Now the requested results are 
available in the “Parameter” sub structure. The output retains its states as long as there is no 
new positive trigger at the #Req input. 
 
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Function Block 
 
 
 
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4.3.2 Write data 
Before writing a parameter value into the sensor a selection is needed. This selection deter-
mines which parameter should be written to the sensor (ParameterSelection). The value that 
should be written can be defined in the “Parameter” sub structure. 
 
Figure 11 shows an example to modify the “preset value” [PNU 65000]. 
 
Figure 11: Writing the “Preset Value” parameter [Part 1/2] 
 
 
Figure 12: Writing the "Preset Value" parameter [Part 2/2] 
 
The writing action starts by calling up the FB with a positive trigger (signal change from 
FALSE to TRUE) at the #Req input bit. The #RW bit must be set to TRUE (write access). As 
long as there is no valid answer the output #Busy is TRUE. In case the timeout period is ex-
cited, a timeout error will be generated and the thread will be terminated. The #Done 
(=TRUE) output shows that the transmission was successful. The output retains its states as 
long as there is no new positive trigger at the #Req input. 
 
 
 Please note! 
 
Please note, that you can write only one parameter at the same time. A multi 
selection is only possible for read-requests. 
 
4.4 Behavior when error occurs 
An error bit #Error is set and an error code #Errorcode is generated if there is an invalid input 
value or an incorrect input connection of the FB_SICK_AFx60_PN. In this case, no further 
processing is carried out until the input has been corrected. 
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5 Parameter 
Parameter Declaration Data type Description 
EN Input BOOL Enable input (only in the FBD view) 
ID Input DWORD Diagnostic address of the “Parameter Access 
Point” sub-module (see Figure 1). 
 
Please enter this value in a hexadecimal rep-
resentation. 
TOut Input TIME If the FB action requires a longer time than the 
“TOut” time, an error is set. 
 
Example: 
TOut:= T#5s 
Req Input BOOL Positive trigger starts a request with the pa-
rameter set in the “Data” (ParameterSelection) 
RW Input BOOL Read/Write selection 
 
FALSE: Read parameter 
TRUE: Write parameter 
Data Input BLOCK_DB This input parameter needs a reference to the 
data block DB_SICK_AFx60_DATA which 
contains the device data and the selection 
bits. 
Done Output BOOL The rising edge indicates if the FB processing 
is completed 
Busy Output BOOL Request in process 
 
FALSE: Request is terminated 
TRUE: Request is being processed 
Error Output BOOL Error flag 
 
FALSE: No error detected 
TRUE: Error detected 
Errorcode Output DWORD Error code (see error code description) 
ENO Output BOOL Enable output (only in the FBD view) 
Table 1: Function block parameters 
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6 Error description 
The parameter #Errorcode contains the following error information: 
- General function block error codes 
- Siemens specific error codes generated by the function blocks RDREC and WRREC 
Further information about these error codes is given in the STEP7 help system. 
 
nBlockError Short description Description 
16#0000_0000 No error No error 
16#0000_0001 Time out Time out error occurred while communicating 
with device. 
16#0000_0002 Reserved - 
16#0000_0003 No variable selected for 
the read/write request 
No variable selected. Please check your var-
iable selection in the “ParameterSelection” 
structure. 
16#0000_0004 More than one variable 
selected for the write 
request 
More than one variable selected. Please 
check your variable selection in the “Parame-
terSelection” structure. 
 
Please note, that you can write only one pa-
rameter at the same time. A multi selection is 
only possible for read-requests. 
16#0000_0005 Unexpected request 
reference received 
The answer telegram contains an unex-
pected request reference value 
(PROFIdrive). 
16#0000_0006 Unexpected data type 
received 
The answer telegram contains an unex-
pected data type value (PROFIdrive). 
16#0000_0007 Unexpected “No. of 
values” received 
The answer telegram contains an unex-
pected “No. of values” value (PROFIdrive). 
16#0000_0008 Reserved - 
16#0000_0009 Parameter not writable Selected parameter is not writeable 
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nBlockError Short description Description 
16#0000_XX0A Encode error Encoder error 
 
XX = Encoder error number (for more in-
formation see device documentation) 
 
16#00 = Impermissible parameter number 
16#01 = Parameter value cannot be changed 
16#02 = Low or high limit exceeded 
16#03 = Faulty sub-index 
16#04 = No array 
16#05 = Incorrect data type 
16#09 = No description data available 
16#0B = No operation priority 
16#0F = No text array available 
16#11 = Request cannot be executed be-
cause of operating state 
16#15 = Response too long 
16#16 = Parameter address impermissible 
16#17 = Illegal format 
16#18 = Number of values are not consistent 
16#19 = Axis/DO nonexistent 
16#65 = Memory resource fails 
16#0000_000B 
– 
16#0000_000F 
Reserved - 
16#XXXX_XXXX Communication error 
(RDREC / WRREC) 
This error is generated by the Siemens func-
tion blocks “RDREC / WRREC”. 
 
XXXX_XXXX= Error code see STEP7 help 
system (SFB52/53) 
 
Error code begins with:16#DE = Error reading data record 
16#DF = Error writing data record 
16#C0 = No DPV1 protocol element used 
Table 2: Function block error codes 
 
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7 Example 
Figure 13 shows an example call up of the FB_SICK_AFx60_PN function block in the OB1 
program. The data block “DB_SICK_AFx60_DATA” contains all accessible service data vari-
ables of the device. The #ID parameter of the FB referenced to the diagnostic address of the 
“Parameter access point” submodule defined in the hardware configuration. 
 
The variable-table “AFx60_Test” is used to control this example program via the SIMATIC 
Manager. 
 
Example program: 
 
 
Figure 13: Example call of the FB_SICK_AFx60_PN function block 
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Function Block 
 
 
 
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7.1 Read a device a parameter 
This example shows how to read out all accessible parameters of the encoder. Before start-
ing the function block with a rising edge at the #Req bit, the following parameters must be 
set: 
 
 
Figure 14: Variable preselection / Start FB 
 
The #Done (=TRUE) output shows that the transmission was successful. Now the requested 
result is available in the data block DB_SICK_AFx60_DATA. The output retains its states as 
long as there is no new request is executing on the same variable. 
 
 
Figure 15: Part of the result value 
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7.2 Write a device parameter 
This example shows how to change the temperature limits [PNU 1006] of the encoder. Be-
fore starting the function block with a rising edge at the #Req bit, the following parameters 
must be set: 
 
 
Figure 16: Variable preselection / Write new value 
 
 
Figure 17: Write a new value 
 
The #Done (=TRUE) output shows that the transmission was successful.