Messages diagnostics

Four types of messages with different diagnostics appear.

Variable Service Message with:

• P – poll message

• W – poke message

• C – cyclic message

• B – block message

In addition to the standard Communication Driver diagnostic messages, the following information is added:

• Message ID

• Two PDU sizes indicating block size if applicable and request block size

• The message or S7 error code

The diagnostic information shows the Communication Driver information text plus the message ID, PDU size, and error text description.