IFM Electronic efector 250 O2D2 Series Owner's manual

Programming manual
Addition
Communication between
object recognition sensor O2D2xx
and Siemens Simatic S7
704567 / 00 02 / 2011
UK

Communication between object recognition sensor O2D2xx and Siemens Simatic S7
2
Contents
1 Preliminary note � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 3
1�1 Symbols used� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 3
2 General� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 3
3 Ethernet connection via TCP protocol � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 4
3�1 Principles � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 4
3�2 Sensor set-up � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 5
3�3 Set-up hardware configuration / NetPro Step7� � � � � � � � � � � � � � � � � � � � � � 8
4 Overview of the function blocks � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �11
4�1 FB54, DB54 – Communication block protocol version 1 � � � � � � � � � � � � � 12
4�1�1 Function block description FB54, DB54� � � � � � � � � � � � � � � � � � � � � � 13
4�2 FB55, DB55 – Communication block protocol version 2 � � � � � � � � � � � � � 14
4�2�1 Function block description FB55, DB55� � � � � � � � � � � � � � � � � � � � � � 15
4�3 FB56, DB56 – Communication block protocol version 3 � � � � � � � � � � � � � 16
4�3�1 Function block description FB56, DB56� � � � � � � � � � � � � � � � � � � � � � 17
4�3�2 Function block description FB 100 - Evaluation of data after the com-
mand "trigger" � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 18
4�3�3 Function block description FB 101 – Evaluation after the command
"read_stat" � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 19
4�3�4 Function block description FB 102 - Evaluation of data after the com-
mand "read_conf" � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 20
4�3�5 Function block description FB 103 - Evaluation after the command
"read_error" � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 21
4�3�6 Function block description FB 104 - Change protocol version� � � � � 22
4�3�7 Further function blocks � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 23
4�4 Implementation for an S7300 controller � � � � � � � � � � � � � � � � � � � � � � � � � � 23
Licences and trademarks
Microsoft®, Windows®, Windows XP® and Windows Vista®are registered trademarks of Microsoft Corporation�
All trademarks and company names are subject to the copyright of the respective companies�

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Communication between object recognition sensor O2D2xx and Siemens Simatic S7
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1 Preliminary note
These instructions serve for the set-up and parameter setting of the communi-
cation between the object recognition sensor O2D2xx from ifm electronic and an
Simatic S7 controller from Siemens�
1.1 Symbols used
► Instruction
> Reaction, result
[…] Designation of pushbuttons, buttons or indications
→ Cross-reference
Important note
Non-compliance can result in malfunctions or interference�
Information
Supplementary note
2 General
The instructions describe the set-up and parameter setting of the communication
of an O2D2xx sensor (rev� 1031) connected to a S7 controller via Ethernet CP with
TCP protocol�
The following functions can be carried out:
● Request the trigger pulse (t)
● Select the application (C<group><number>)
● Request the assignment of the application data from the device (a?)
● Request the statistics from the device (s?)
● Request the error code from the device (E?)
● Request the last result from the device (R?)
● Request the device information (D?)

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3 Ethernet connection via TCP protocol
3.1 Principles
The data of the TCP connection are transmitted as a data flow, i�e� there is no
defined start or end character on the protocol level� The returned data is received
byte-for-byte and stored in the receive buffer�
For communication via Ethernet, all TCP protocol compatible Ethernet CPs can be
used� However, the different selection of the Siemens communication blocks when
using controllers of the 300 or 400 series is to be taken into account�
The communication was tested with a CPU 414-2DP and a CP 443-1�
The device supports 3 different protocol versions, there is a communication block
provided for each protocol version�
Version Format
V1 <contents>CR LF
V2 <ticket><contents>CR LF
V3 <ticket><length>CR LF <ticket><contents>CR LF
After a voltage failure, the sensor always communicates in the protocol
version V2 after restart�
► Select the requested protocol version�

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3.2 Sensor set-up
► Set Applications → Network parameters → IP address, Subnet mask, etc�

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► Select the trigger type "TCP/IP" in the active configuration�

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► Configure the process interface�
If the detail output is deactivated in this setting, the parameter "Detail_akt" must
also be deactivated in FB100�

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3.3 Set-up hardware configuration / NetPro Step7
► Set up and link the object recognition sensor as "Other Station" in NetPro�

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► Create the TCP connection with the object recognition sensor�
► Note down the connection ID and CP address for the function block parameter
setting�

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► Set up the port number as in the parameter setting software�

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4 Overview of the function blocks
FB54, DB54 – Communication block protocol version 1
FB55, DB55 – Communication block protocol version 2
FB56, DB56 – Communication block protocol version 3
FB57, DB57 – Change protocol version
FB100, DB100 – Trigger evaluation
FB101, DB101 – Status evaluation
FB102, DB102 – Error message evaluation
FB103, DB103 – Evaluation application assignment
FC11 – (Siemens Standard) FIND
FC16 – (Siemens Standard) I_STRING
FC26 – (Siemens Standard) MID
FC37 – (Siemens Standard) STRING_DI
FC38 – (Siemens Standard) STRING_I
FC40 – INT ->ASCII ticket number
FC41 – INT ->ASCII group number
FC42 – INT -> ASCII configuration number
DB220 – Data field assignment of the application data
DB221 – Data field user data after trigger event
DB222 – Receive buffer

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4.1 FB54, DB54 – Communication block protocol version 1
► Indicate ID and LADDR (as set up in Net-Pro)�

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4.1.1 Function block description FB54, DB54
The parameter RECV_BUF must be declared as absolute, because with
some controller types the width of access may not be transmitted correctly
in case of symbolic declaration�
The function block establishes the messages to be sent to the sensor and creates
a character string from the received data flow�
The "trigger" input sends a trigger command to the sensor with each positive edge�
In addition the receive buffer is deleted�
The "change_appl" input sends an application change command to the sensor with
each positive edge� The preselection is indicated at the inputs "group_nr" and "ap-
pl_nr"� Moreover, the receive buffer is deleted� (group_nr always 0 with O2D22X)
The inputs "read_conf", "read_last", "read_error", "read_info" and "read_stat" send
the corresponding status query to the sensor with each positive edge� In addition,
the receive buffer is deleted�
The received data is read byte-by-byte from the data flow and then stored conse-
cutively in the receive buffer�
The length of the receive buffer is defined variably as ANY pointer and can be
extended or reduced according to the respective requirements�

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4.2 FB55, DB55 – Communication block protocol version 2
► Indicate ID and LADDR (as set up in Net-Pro)�

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4.2.1 Function block description FB55, DB55
The parameter RECV_BUF must be declared as absolute, because with
some controller types the width of access may not be transmitted correctly
in case of symbolic declaration�
The function block establishes the messages to be sent to the sensor and creates
a character string from the received data flow�
The "trigger" input sends a trigger command to the sensor with each positive edge�
In addition, the receive buffer is deleted�
The "change_appl" input sends an application change command to the sensor with
each positive edge� The preselection is indicated at the inputs "group_nr" and "ap-
pl_nr"� Additionally, the receive buffer is deleted� (group_nr always 0 with O2D22X)
The inputs "read_conf", "read_last", "read_error", "read_info" and "read_stat" send
the corresponding status query to the sensor with each positive edge� The receive
buffer is also deleted�
The "ticket" no� is incremented internally in the function block�
The received data is read byte-by-byte from the data flow and then stored conse-
cutively in the receive buffer�
The length of the receive buffer is defined variably as ANY pointer and can be
extended or reduced according to the respective requirements�

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4.3 FB56, DB56 – Communication block protocol version 3
► Indicate ID and LADDR (as set up in Net-Pro)�

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4.3.1 Function block description FB56, DB56
The parameter RECV_BUF must be declared as absolute, because with
some controller types the width of access may not be transmitted correctly
in case of symbolic declaration�
The function block establishes the messages to be sent to the sensor and creates
a character string from the received data flow�
The "trigger" input sends a trigger command to the sensor with each positive edge�
Also, the receive buffer is deleted�
The "change_appl" input sends an application change command to the sensor with
each positive edge� The preselection is indicated at the inputs "group_nr" and "ap-
pl_nr"� The receive buffer is deleted in addition� (group_nr always 0 with O2D22X)
The inputs "read_conf", "read_last", "read_error", "read_info" and "read_stat" send
the corresponding status query to the sensor with each positive edge� Apart from
that, the receive buffer is deleted�
The "ticket" no� is incremented internally in the function block�
The received data is read byte-by-byte from the data flow and then stored conse-
cutively in the receive buffer�
The length of the receive buffer is defined variably as ANY pointer and can be
extended or reduced according to the respective requirements�

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4.3.2 Function block description FB 100 - Evaluation of data after the
command "trigger"
With a positive edge on the input "Start", the data from the receive buffer is evalua-
ted once and moved to the data block�

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4.3.3 Function block description FB 101 – Evaluation after the command
"read_stat"
With a positive edge on the input "Start", the data from the receive buffer is evalua-
ted once and provided on the output�
► Indicate the set protocol version of the sensor on the input�

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4.3.4 Function block description FB 102 - Evaluation of data after the
command "read_conf"
With a positive edge on the input "Start", the data from the receive buffer is evalua-
ted once and moved to the data block�
► Indicate the set protocol version of the sensor on the input�