Best E5 Series User Manual page 154

Chapter 5 Specification of Parameters
Process PID is provided with two groups of proportion, integral and differential parameters set
by P50.14. P50.11~ P50.13 are the second group of parameters.
P50.14 PID parameter switchover
Process PID is provided with two groups of proportional, integral and differential parameters,
which is set by this parameter.
0: No switch, determined by parameters Kp1, Ti1 and Td1
Always determined by Kp1, Ti1 and Td1 set at P50.08~P50.10.
1: Auto switched on the basis of input offset
When the offset between setting and feedback is less than the set value of P50.15, PID
adjustment is determined by Kp1, Ti1 and Td1. When the offset between setting and
feedback is bigger than the set value of P50.15, PID adjustment is determined by Kp2, Ti2
and TP32 set at P50.11~P50.13.
2: Switched by terminal
When digital input terminal "PID parameters switch" is OFF, it is determined by Kp1, Ti1 and
Td1. When "PID parameters switch" is ON, it is determined by Kp2, Ti2 and TP32
Input offset under
P50.15
PID auto switch
When P50.14 is set to 1, this parameter sets the switching point of the two groups of PID
parameters.
When the offset between setting and feedback is less than this set value, it is determined
by Kp1, Ti1 and Td1.
When the offset between setting and feedback is bigger than this set value, it is
determined by Kp2, Ti2 and TP32.
P50.16 Sampling period T
Sampling period aims at feedback. PID controller performs the sampling and compute once in
each sampling period. The longer the sampling period T is, the slower the response time will
be.
PID offset limit
P50.17
If the offset between PID feedback and setting is more than this set value, PID regulator will
implement regulation. If the offset between PID feedback and setting is less than this set value,
PID will stop the regulation and the PID controller output will be kept unchanged. This function
can improve the stability of PID performance.
Range: 0~2
Range: 0.0%~100.0%
Range: 0.001s~50.000s
Range: 0.0%~100.0%
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E5 User Manual
Factory default: 0
Factory default:
20.0%
Factory default:
0.002s
Factory default:
0.0%