Hey Everyone,
After reading a lot on this forum and elsewhere I see not many are fond of the 1794-VHSC module. I can see to a degree as I was running across issues with it as well. I'm using this module to count pulses from a flow meter. I did not know if I would need the module and could possibly get away with just using a digital input. What is nice about the flow meter is that it has a scalable pulse output feature. I'm choosing to do 100:1.
This is a two part question. Does anyone know the correct wiring for this module. I did get it to count on the A input. Though according to the manual the A indicator should be flashing. When I talked it over with a co-worker we ended up putting 0V to the A- terminal and that is when it started flashing. It still counted but we got pulses just rising when there was no flow. It would count past 1000 pulses after target was met. The manual directly says that the A,A_ are 24V inputs. Which I'm assuming is for an encoder. (I have no experience with encoders). The card should need a 0V reference correct?
Second part,
Has anyone had experience with this module faulting? It seemed to work for many days straight then all of a sudden the module (not the 1794-AENTR) started flashing. Went through the manual. Power is Ok, it was not left in PROG mode, no network cable disconnected or faulty. There were status bits set to one. Status.1 and status.15. When the module started flashing it would not allow pulse capture.
There are no active filters for any counter
The rollover is set to 16777215
The mode selected is counter
Signs point to a configuration issue but I do not know what.
1769-L30 PLC
This rack has an AENTR, digital input module, digital output module, analog in module and VHSC
After reading a lot on this forum and elsewhere I see not many are fond of the 1794-VHSC module. I can see to a degree as I was running across issues with it as well. I'm using this module to count pulses from a flow meter. I did not know if I would need the module and could possibly get away with just using a digital input. What is nice about the flow meter is that it has a scalable pulse output feature. I'm choosing to do 100:1.
This is a two part question. Does anyone know the correct wiring for this module. I did get it to count on the A input. Though according to the manual the A indicator should be flashing. When I talked it over with a co-worker we ended up putting 0V to the A- terminal and that is when it started flashing. It still counted but we got pulses just rising when there was no flow. It would count past 1000 pulses after target was met. The manual directly says that the A,A_ are 24V inputs. Which I'm assuming is for an encoder. (I have no experience with encoders). The card should need a 0V reference correct?
Second part,
Has anyone had experience with this module faulting? It seemed to work for many days straight then all of a sudden the module (not the 1794-AENTR) started flashing. Went through the manual. Power is Ok, it was not left in PROG mode, no network cable disconnected or faulty. There were status bits set to one. Status.1 and status.15. When the module started flashing it would not allow pulse capture.
There are no active filters for any counter
The rollover is set to 16777215
The mode selected is counter
Signs point to a configuration issue but I do not know what.
1769-L30 PLC
This rack has an AENTR, digital input module, digital output module, analog in module and VHSC