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Diagnostics
WAGO-I/O-SYSTEM 750
750-632 Proportional Valve Module
Manual
Version 1.3.0, valid from FW/HW-Version 01/01
10.5.2 Short Circuit
As soon as a short circuit occurs, the output stage is automatically switched off.
The LEDs for “Status channel A” and “Status channel B” light up red. The status
bit READY is set to “0”. The bits 1, 2, and 6 in the status byte of the internal data
bus are set to “1”. The subsequent figure clarifies the behavior:
Figure 54: Response During Short Circuit
10.5.3 Wire Break
The actual value of the current is evaluated as soon as a target value greater than
10 mA is applied for the current. If, in addition, the actual value of the current is
less than 5 mA for one second, then the “wire break” diagnosis is triggered. If a
wire break has occurred, the output stage is automatically switched off. The LEDs
for “Status channel A” and “Status channel B” light up red. The status bit
READY is set to “0”. The bits 1, 2, and 6 in the status byte of the internal data bus
are set to “1”. The subsequent figure clarifies the behavior.
10.5.4 Overtemperature
If a temperature sensor is built into the I/O module, the the module is
automatically protected from high temperatures. The outputs are automatically
switched off beginning at a temperature of 102°C. As soon as the temperature
reaches this value, the READY bit is set to “0” and the diagnostic bits in the status
byte of the internal data bus are set to “1”. If the temperature falls below a value
of 97°C, then the outputs can be switched on again. The figure in the “Short
circuit” section clarifies this behavior.
If the mailbox is enabled, then two diagnostic messages are additionally sent: