Fisher DPR900 User Manual page 122

A-2
Appendix A
[FISHER"]
Fault Code
Meaning Precautions
E 101 Fault detected while monitoring process
Ensure that sensor 1 is connected and oper-
value with sensor 1. Sensor 2 has taken ating properly.
over control.
E 102
E 103
E 104
E 105
Fault detected while monitoring processval- Ensure that sensor 2 is connected and oper-
ue with sensor 2. Sensor 1 has taken over ating properly.
control.
Output signal failure at analog output 2 Checkcurrent path between pins 11 and 12.
(A02). Check connections and receiving device.
Check that load is less than 650 ohms.
Check dc supply for overload (max 1 OOmA).
Check supply voltage is not less than 10%
of nominal. Check FCODE 124 set to Option
2 if A02 is not in use.
Controller has not been tested. It was either
Contact your Fisher representative.
delivered untested or the parameter and
function EEPROM has been exchanged or
corrupted since delivery.
Difference between setpoint value and pro- Bring process value and setpoint value clor
cess value when autotuning started is too er to each other, then restart autotuner func
large. Tuning started with output signal too tion. Retune at level between 10 and 90%.
close to 0% or 100%. Tuning function is
I
aborted
E 106
E 107
E 108
WARNING: Process noise level too high or A process load upset during early tuning.
process not stable enough for autotuner Switch controller to manual mode and stabi-
function to operate properly. This is only a lize process, or filter the process value. Re-
warning, the controller continues to tune, tune.
but results may not be optimum.
WARNING: Disturbance has occurred in Check PID parameters and possibly retune
the process during a tuning procedure. Tun-
the controller as the parameters may not be
ing function continues, but results may not optimum.
be optimum.
Tuning procedure has exceeded the None required. Controller automatically re-
32-hour maximum limit. This is a fatal tuning turns to the state it was in before the user
error and tunina has been aborted. started the autotuner.
UM6.1:DPf?900;9147 Change 2 -July 1992