Automatic - Manual Switch-Over - PMA KS 800 Functional Description

Multi-Temperature-Controller KS 800
7

Automatic - manual switch-over

According to determination, automatic - manual switch-over via the interface is possible. The
controller statuses resulting from the signal priority are as follows:
8
Controller
off
0
0
0
0
0
0
0
0
1
The operating status after power failure is dependent of the interface signals stored last (EE-
PROM). Automatic/manual switch-over is bumpless. The last correcting variable calculated by the
controller is output as effective manual value. With controller re-start, YHand is initialized with
0%.
With several simultaneous statuses, the status with the highest priority is effective.
There are three methods for adjusting the manual correcting variable:
1. Absolute adjustment:
Absolute manual correcting value (Yman). This adjustment is not applicable for
three-point stepping controller.
2. Differential adjustment:
Adjustment of the value for changing the correcting variable (dYman).
3. Incremental adjustment:
Values for incremental adjustment (positive direction Yinc, negative direction Ydec,
Ygrw_l_s). Signal ...Ygrw_ls selects the speed of incremental adjustment
(slow = 40 sec, fast = 10 sec for 100% change). These data are only valid for 2
and 3-point controller; with three-point stepping controllers, the speed is
determined by the motor actuator.
Function block controller type no.: 91, function Correcting variable, function number 4.
Abbr.
dYman
Yman
Yinc
Ydec
Ygrw_ls Speed for incr. / decr. correcting
24
Priority
7
Y-Track Controller
manual
0
0
1
1
0
0
1
1
x
Description
Differential correcting variable
Absolute correcting variable
Increm. corr. variable adjustm.
Decrem. corr. variable adjustm.
variable adjustment
9499 040 49211
5 3
Sensor failure
0 0
0 1
0 0
0 1
1 0
1 1
1 0
1 1
x x
Range
-210...210
-105...105
0
1
0
1
0
1
Controller status
Automatic
Sensor failure
Y-Track
Y-Track
Manual
Manual
Y-Track
Y-Track
Controller off
Remarks
0 = off
1 = on
0 = off
1 = on
0 = slow
1 = fast