146 • CANopen
Network
Communication
WAGO-I/O-SYSTEM
750
CANopen
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.
DD 07 PK SK NN
Design of the Additional Code of the Diagnosis message:
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
Bit 7 = 1 Error detected, Bit 7 = 0 Error cleared
Position of the module
Identifier of the diagnosis message
Module specific diagnosis b
y
te (analog modules)
Module specific diagnosis b
y
te (digital modules)
0 if the error have been cleared, i.e. b
y
te SK Bit 8 = 0
Fig. 4-5: Design of Additional Code
g012423e
Example:
•
2 channel analog input module 750-465, connected at position14, cur-
rent on channel 0 has more than 20mA.
00 FF 81 42 07 0E 80 01
Emergency Telegram
1 Error
Channel 0
Error detected
Module plugged at position 14
Diagnosis message
Current > 20,5 mA (see module description)
Error Register
Error Code
Fig. 4-6: Design of Emergency-Telegramm 1
g012424e
•
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.
