Table 38: Protocol 0X81, Pdu Structure; Table 39: Protocol 0X81, Structure Of Pdus, Legend - WAGO -I/O-SYSTEM 750 Manual

82 Appendix
The table below shows the structure of PDUs for this protocol:

Table 38: Protocol 0x81, PDU Structure

Service PDU
Diagnostics

Table 39: Protocol 0x81, Structure of PDUs, Legend

Description Description
-
EC1
EC0
EQ
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This byte is not used by this PDU
Event or error code, top byte (MSB)
Event or error code, bottom byte (LSB)
Event qualifier:
Bit 7 ... 6 Mode
Bit 5 ... 4 Type:
Bit 3 ... 0 (reserved)
WAGO-I/O-SYSTEM 750
Structure of PDU (Bytes 0 ... 5)
0 1 2
0xFF EC1 EC0 0x00
0: reserved
1: One-time message
2: Event disappears
3: Event appears
0: reserved
1: Notification
2: Warning
3: Error
Version 1.2.0, valid from FW/HW-Version 01/01
750-658 CAN Gateway
3 4 5
EQ -
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