CD600 Plus - User's Manual
4.70
Function 29 - Input Selector (ISEL)
Operation
This block selects one of the two inputs to be the output signal, by means of switch CH1. The switch
is activated by a high logic level at input
C.
A
B
C
237/238
239/240
BLK 103/104/105/106
0
1
CH1
The inputs and the output may range from -102.00 to +102.00%. A high logic level at C switches
CH1 to position "1".
It is possible to lock the switch in position "0" with the parameter
CLCK.
If the block output is linked to a visualization block (
Front View or General View), any register
actuator linked to either one of the block inputs, can be actuated as it would be, if it were directly
linked to the visualization block. An example where that applies is shown in Figure 4.29.1.
EXAMPLE:
Fig 4.29.1 - Control Loop with two-setpoint actuators
In that configuration, if the switch CH1 of the block 103 is at position "0", the register actuator cannot
e actuated. b
But if CH1 is at position "1" and the block 031 is in Local mode, the register actuator of the block 031
an be actuated. c
TYPE MNEM DESCRIPTION RANGE DEFAULT
I LIA Input A 0
I LIB Input B 0
I LIC Input C - Switches CH1
Addresses
0 to 170/225 to 240
0
I CLCK Locks switch CH1 in position 0 0 - No/1 - Yes 0
umber of Bytes per Type of Parameter: A = 0 C = 2 L = 6 N
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