Where do you prefer to scale instrumentation?
I was at customers shop and they had an instrument that was a 1-5VDC to a signal conditioner to make it a 4-20mA then in the PLC the had a SCP instruction .
They had scaling in the signal conditioner and the PLC. I dont know why they used the signal conditioner for anything other than a V-mA converter.
I like to do all my scaling in the PLC. If I can keep the instrument at factory default I will. A lot of the temperature probes that are out there are 0-100°C. Di the conversion in the PLC and any maintenance guy can change it without configuring anything.
What are your thoughts? Im getting more and more into the process world and trying to make better decisions from the collective experience here.
I was at customers shop and they had an instrument that was a 1-5VDC to a signal conditioner to make it a 4-20mA then in the PLC the had a SCP instruction .
They had scaling in the signal conditioner and the PLC. I dont know why they used the signal conditioner for anything other than a V-mA converter.
I like to do all my scaling in the PLC. If I can keep the instrument at factory default I will. A lot of the temperature probes that are out there are 0-100°C. Di the conversion in the PLC and any maintenance guy can change it without configuring anything.
What are your thoughts? Im getting more and more into the process world and trying to make better decisions from the collective experience here.