I have a chiller with two compressors
Two condensor pumps
Two chiller pumps
Three dry cooler fans
It is being independently controlled with a Modbus PLC
The controller has a LCD screen,but all that can be done is
a setpoint adjustment and basic temp monitoring
The configuration program which has over 4000 lines of code
requires extensive assembly language programming
registers,timers and many move instructions.
There is about nine miles of wiring on the chiller
I want to more or less leave the chiller the way it is
The rest of the site uses a Johnson Metasys sytem with an N-31
I want the Johnson system to
monitor some chiller points
Adjust the setpoint
start /stop the chiller with a schedule
start /stop the chiller based on outdoor air
I am looking at the Johnson Modbus Integrator
1) Will this work with an N-31 or will we have to
Upgrade to and NAE or FX-40?
2) Will this require extensive work to integrate it into
the Metasys system?