Diagnostic Message Of I/O Modules - WAGO -I/O-SYSTEM 750 Technical Description

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4.3.9.1 Diagnostic Message of I/O Modules

In the event of an error occurring in a module, which supports diagnostics, the
diagnostic status is transmitted by means of the emergency message.
Design of the Additional Code of the Diagnosis message:
DD 07 PK SK NN
Fig. 4-5: Design of Additional Code
Example:
Emergency Telegram
00 FF 81 42 07 0E 80 01
Fig. 4-6: Design of Emergency-Telegramm 1
Number of current module errors
Bit 0,1, 2 indicates the channel number of the module (channel 0..7)
Bit 3 reserved
Bit 7 indicates detected or cleared errors
Position of the module
Identifier of the diagnosis message
Module specific diagnosis byte (analog modules)
Module specific diagnosis byte (digital modules)
• 2 channel analog input module 750-465, connected at position14, cur-
rent on channel 0 has more than 20mA.
• In addition to the first error, another error occurs on a 2 channel digital
output module 750-506. A wire break on channel 1, the module is con-
nected at position 17.
Bit 7 = 1 Error detected, Bit 7 = 0 Error cleared
0 if the error have been cleared, i.e. byte SK Bit 8 = 0
1 Error
Channel 0
Error detected
Module plugged at position 14
Diagnosis message
Current > 20,5 mA (see module description)
Error Register
Error Code
g012423e
g012424e
WAGO-I/O-SYSTEM 750
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