USER MANUAL – Z-PASS1/Z-PASS2
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on a successful RTU (Master) read/write operation, for tags with Mode=GATEWAY|BRIDGE
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on Modbus Gateway start and on a successful TCP or RTU (Slave) write operation, for tags with
Mode=SHARED MEMORY
In the above figure, the first three tags (Mode=GATEWAY) have been successfully read, so the “TAG
READING STATUS” column shows “OK” and the “LAST REFRESH TIME” column contains a valid timestamp.
The next three tags (Mode=BRIDGE) have not been read nor written yet, so the “TAG READING STATUS”
column shows “FAIL(BRIDGE)” and the “LAST REFRESH TIME” column does not contain a timestamp.
Finally, for the last tags (Mode=SHARED MEMORY), the “TAG READING STATUS” column shows “-“ and the
“LAST REFRESH TIME” column contains a valid timestamp that, in this example, corresponds to the Modbus
Gateway start time.
Just as an example, the tag configuration corresponding to the above figure is show below.
