Controller Sampling Time For Hot Channel Control - Siemens SIMATIC S5 Manual

Ip 244 temperature controller with function block fb 162
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Special Functions for Plastic Machines
The parameters required for the approach are entered in message 15.
Approach time t
AZ
Approach manipulated variable S
Approach zone Z
A
Approach setpoint SW
A

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:
1 to 6 controllers:
1 to 13 controllers:
t
= conversion time
c
4–74
in byte 7
in byte 8
in byte 9
in bytes 10/11
T
= (6+1)
A min
T
= (6+1+1)
A min
T
= (13+1)
A min
(0 to 60 min)
(0 to 100 %)
(0 to 255 C)
(0 to 1600 C)
t
= 350 ms
without heating current
c
monitoring
t
= 400 ms
with heating current
c
monitoring
t
= 700 ms
no heating current
c
monitoring possible
C79000–B8576–C860–02
IP244

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