unsaint32
Member
At my work, we have Controllogix 1756 L71 with DI, DO, and a servo card (1756-MO2AE). Today, a DI terminal was occasionally not registering input signal. We also noticed that the servo card was not working. My boss concluded that the shield wire grounding on the servo card was the problem. He told me to disconnect all shield wires from the servo card chassis terminals, twist them together and land them on the GND bus that was used for general control voltage.
As you can see in the picture I am posting (it came from the module manual), there are two terminals in each channel for landing shield wires to chassis: #11 for drive wire shield to chassis, #23 for encoder wire shield to chassis.
I don't know what the optional k-module is, but we don't have that.
Q1) Could the the wiring had been switched by accident? (the encoder wire shield to #11 instead of #23. However, even if so, could that possibly cause that big of a problem?
Q2) What kind of problems could happen, now I wired the encoder and drive shield wires to the control GND bus?
Q3) Does anyone know if this servo card has some kind of fuse I can reset?
Thanks.
As you can see in the picture I am posting (it came from the module manual), there are two terminals in each channel for landing shield wires to chassis: #11 for drive wire shield to chassis, #23 for encoder wire shield to chassis.
I don't know what the optional k-module is, but we don't have that.
Q1) Could the the wiring had been switched by accident? (the encoder wire shield to #11 instead of #23. However, even if so, could that possibly cause that big of a problem?
Q2) What kind of problems could happen, now I wired the encoder and drive shield wires to the control GND bus?
Q3) Does anyone know if this servo card has some kind of fuse I can reset?
Thanks.