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4.5.4 3-point stepping controller (relay & relay)
InP. 1 Ê
Out. 1 Â
ConF / Cntr:
ConF / Out. 1 :
ConF / Out. 2 :
PArA / Cntr:
PArA / SEtP:
g
For direct action of the 3-point stepping controller, the controller output action
must be changed ( ConF / Cntr / C. A ct = 1 ).
setpoint
output 1
output 2
8800 process controller
SP. L O
InL. 1
PB1
100%
0%
SP. F n = 0
C. F nc = 4
C. A ct = 0
O. A ct = 0
Y. 1
= 1
Y. 2
= 0
O. A ct = 0
Y. 1
= 0
Y. 2
= 1
Pb1
= 1...9999
ti1
= 0,1...9999
td1
= 0,1...9999
t1
= 0,4...9999
SH
= 0...9999
tP
= 0,1...9999
tt
= 3...9999
SP. L O = -1999...9999 set-point limit low for Weff
SP. H i = -1999...9999 set-point limit high for Weff
55
SP
SP. H i
SH
set-point controller
3-point stepping controller
inverse action
(e.g. heating applications)
action Out. 1 direct
control output Y1 active
control output Y2 not active
action Out. 2 direct
control output Y1 not active
control output Y2 active
proportional band 1 (heating)
in units of phys. quantity (e.g. °C)
integral time 1 (heating) in sec.
derivative time 1 (heating) in sec.
min. cycle time 1 (heating)
neutral zone in units of phy. quantity
min. pulse length in sec.
actuator travel time in sec.
process value
Configuration examples
Configuration level
InH. 1
100%
Out. 2 Â
0%
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