Special Functions for Plastic Machines
IP244
C79000–B8576–C860–02
4–74
The parameters required for the approach are entered in message 15.
Approach time t
AZ
in byte 7 (0 to 60 min)
Approach manipulated variable S in byte 8 (0 to 100 %)
Approach zone Z
A
in byte 9 (0 to 255 C)
Approach setpoint SW
A
in bytes 10/11 (0 to 1600 C)
3.1.3 Controller Sampling Time for Hot Channel Control
The sampling time can be shortened by switching off individual controllers (setpoint=0). The
processing of the two voltage channels and the comparator is also dropped.
No Pt 100 operation and no special function is possible with hot channel control. Only heating 2-step
controllers are allowed. The self-tuning function cannot be used with hot channel control. Main
control byte 1, bit 2 is set to 0 by the IP internally.
When using hot channel control, the conversion time is 50 ms (regardless of jumper D).
The following minimum sampling times are then obtained:
1 to 6 controllers: T
A
min
= (6+1) t
c
= 350 ms without heating current
monitoring
1 to 6 controllers: T
A
min
= (6+1+1) t
c
= 400 ms with heating current
monitoring
1 to 13 controllers: T
A
min
= (13+1) t
c
= 700 ms no heating current
monitoring possible
t
c
= conversion time
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