creativepaper
Lifetime Supporting Member
I am changing over from a Honeywell motor contorl system. I am using a AB ControlLogix L61 processor to control the system (as well as other systems like drives). I have not changed the wiring compared to the Honeywell system, therefore I'm taking their wires and putting them into the equivilent IO on the AB system.
The Honeywell system uses Opto22 relays to control the motors. The 120VAC power is taken from a transformer in the Motor control buckets. Attached is a PDF of the wiring.
The AB modules that I am using is
1756-IA16I
1756-OW16I
The logic shows the status of the motor. If the input is dropped without the stop button being pressed, then the motor shows failed. This has been happening to me at 5:50AM ish for the past 2 days and I do not know why (we are a 24x7 operation so no system power fluctuations). I have 4 motors (not critical ones) on this system and they all fail at the same time.
I can put the motors in manual (which holds the contactor) and they do not fail. When on the Honeywell system they do not fail, so why do they on mine?
I have not yet put a logger on the input to ensure that the voltage doesn't drop too much, which I suppose is the next thing to do, but wouldn't that affect Honeywell system?
The system has teh main processor going to a N-Tron 508-TX switch then to drives, HMI pannels, remote IO. With all this the ethernet CPU is around 70% (when checking on the webpage) with some spikes to 80%. I have ordered another Ethernet card to put in the main system to try to stem this.
My RPI for the motor remote IO system is 100ms
My processor is 93ish percent but I have a continuous loop which has a scan rate of 3ms (watchdog is 500ms) as with all my other processor stuff.
My timeslice is set to 50% and as mentioned above the scan rate is very good.
Sorry for the long post, but I wanted to make sure you have enough info to try to help me.
'Help me PLC.net.... you are my only hope!"
The Honeywell system uses Opto22 relays to control the motors. The 120VAC power is taken from a transformer in the Motor control buckets. Attached is a PDF of the wiring.
The AB modules that I am using is
1756-IA16I
1756-OW16I
The logic shows the status of the motor. If the input is dropped without the stop button being pressed, then the motor shows failed. This has been happening to me at 5:50AM ish for the past 2 days and I do not know why (we are a 24x7 operation so no system power fluctuations). I have 4 motors (not critical ones) on this system and they all fail at the same time.
I can put the motors in manual (which holds the contactor) and they do not fail. When on the Honeywell system they do not fail, so why do they on mine?
I have not yet put a logger on the input to ensure that the voltage doesn't drop too much, which I suppose is the next thing to do, but wouldn't that affect Honeywell system?
The system has teh main processor going to a N-Tron 508-TX switch then to drives, HMI pannels, remote IO. With all this the ethernet CPU is around 70% (when checking on the webpage) with some spikes to 80%. I have ordered another Ethernet card to put in the main system to try to stem this.
My RPI for the motor remote IO system is 100ms
My processor is 93ish percent but I have a continuous loop which has a scan rate of 3ms (watchdog is 500ms) as with all my other processor stuff.
My timeslice is set to 50% and as mentioned above the scan rate is very good.
Sorry for the long post, but I wanted to make sure you have enough info to try to help me.
'Help me PLC.net.... you are my only hope!"