These blocks initialize and control communication between ibaPDA and the S7 controller.
The ibaREQsym block family allows access to both optimized and non-optimized data blocks. Addressing is done by using only the symbol names.
One set of Request blocks has to be called for each Request module (connection) in ibaPDA. The blocks used are part of the iba S7 library, see iba S7 library.
Note |
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Only use Request blocks from the latest iba S7 library! Request blocks in application examples can be outdated and, thus, cause errors. |
Use different Request block combinations depending on the current system configuration:
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Request block |
S7-1500 CPU with integrated PN interface |
S7-1500 CPU with CM1542-1 |
Recommended call level |
|---|---|---|---|
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ibaREQsym_M |
X |
X |
OB1 or OB3x1 |
|
ibaREQsym_NetE |
X |
X |
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ibaREQsym_PN |
X |
X |
|
|
ibaREQsym_DB_PDA |
X |
X |
- |
|
ibaREQsym-Interface |
X |
X |
- |
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ibaREQsym_M (Management) The block realizes the communication with ibaPDA. Ideally, the block is called in OB1.
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ibaREQsym_NetE (buffering and sending of current signal values) The block buffers the current signal values and sends them to ibaPDA.
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ibaREQsym_PN (provision and sending of current signal values) The block provides the current signal values using the transmission cycle. Ideally, the block is called in a cyclic interrupt OB.
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ibaREQsym_DB_PDA (DB interfaces) This DB acts as an interface to ibaPDA and between the different Request blocks.