YOKOGAWA UT350, Instruction Manual

Page: 77 / 82

<Toc> <6. Function Block Diagram and Descriptions>
6-5
IM 05D01D02-41E 1st Edition : May 31,2000-00
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Contact Input
Changing the setpoint of the parameter DIS (DI function selection) allows you to change
the function of contact input.
●
When DIS=OFF
No function for contact input.
●
When DIS=1 (factory-set default)
Target setpoint 2 (ON)/Target setpoint 1 (OFF) switching function is assigned to DI1 (con-
tact input 1).
Automatic (ON)/Manual (OFF) switching function is assigned to DI2 (contact input 2).
Manipulated output can be changed using the and keys in manual mode.
●
When DIS=2
Hide (ON)/Show (OFF) the parameter LOCK (key lock) switching function is assigned to
DI1 (contact input 1).
No function is assigned to DI2 (contact input 2).
●
When DIS=3
It is possible to select one out of four setpoints by turning the two contact input signals ON
or OFF. This function is assigned to DI1 (contact input 1) and DI2 (contact input 2).
Contact
input
DI1
DI2
Target setpoint number to be selected (SP.NO)
4
ON
ON
3
OFF
ON
2
ON
OFF
1
OFF
OFF
For example, set contact input 1 (DI1) only to “ON” to change target setpoint 1 to 2. Set contact inputs 1 (DI1) and 2 (DI2) to
“ON” to select target setpoint 4.
●
When DIS=4
Target setpoint 2 (ON)/Target setpoint 1 (OFF) switching function is assigned to DI1 (con-
tact input 1).
Run (OFF)/Stop (ON) switching function is assigned to DI2 (contact input 2). Preset output
value is output when the operation is stopped. PV input and alarms remain functioning as
normal.