Balluff BIS M-62 Series, Manual

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Industrial Ethernet (IND)
INTERFACE
83
5
5.8.2
Industrial Ethernet (IND)
Handshaking Example
In the example below, EMS_READ1 is the name of the Read Tag and EMS_WRITE1 is the
name of the Write Tag.
NOTE
[0] indicates the first word, [1] indicates the second word in a controller tag.
1. The PLC writes the command to the Read Tag (EMS_READ1) and then increments
the counter in EMS_READ1 [1]
2. The counter in EMS_READ1 [1] is copied by the BIS M-626 to EMS_WRITE1 [0]
which acknowledges that the command has been received.
3. Following execution of the command, the BIS M-626 copies the response to
EMS_WRITE1 (the Write Tag) and increments the counter in EMS_WRITE1 [1]. This
signals that there is new data for the PLC (the BIS M-626 generated response, in this
case).
4. After the PLC has processed the response information, it copies the counter from
EMS_WRITE1 [1] to EMS_READ1 [0] which signals to the BIS M-626 that the PLC
has retrieved the response data.