172-65710M-04 (SC-F71 Parameters/Functions) 23 Dec 2021
197
Different input type can be specified for Input 1 and Input 2. Note that action may
be different on each input.
To also determine errors on external circuits, measure the same location on two
external circuits and connect them as Input 1 and Input 2 respectively.
To output “Input 1_Input error high/low,” output assignment must be set in
advance. Refer to 6.1 Changing Output Assignment [Control Output,
Retransmission Output, Logic Calculation (Event) Output, Instrument Status
Output] for output assignment.
Irrespective of Input circuit error alarm setting, “Input 1_Input error high/low”
conducts normal Input error alarm action.
Refer to 5.7 Changing Error Handling at Input Error When set to the event state
simultaneously with power turned on operation at Input error action.
Before using the Input circuit error alarm, check for errors in measured values
between Input 1 and Input 2 which should be removed in advance using PV bias.
The Input circuit error alarm function uses two inputs, but control using Input 2 is
not available. However, lighting the ALM lamp and providing state output from
Digital output (DO) are possible.
Parameter setting
Select function for Input 2 [Engineering Mode: Function block No. 58 (
Fn58
)]
Parameter symbol
Data range
Factory set value
r
2 P V
0: No function
1: Remote setting input
2: 2-loop control/Differential temperature control
3: Control with PV select
4: Cascade control (Slave single
Cascade) *
5: Cascade control (Master single
Cascade) *
6: Input circuit error alarm
PID control: 0 to 6
When pressure control operation [MC-(V)COS(R)] is selected:
0 to 2, 6
Heating/Cooling control: 0 to 3, 6
1
Refer to “4. Parameters that are Initialized/Modified when setting is Changed” for
the parameters that are initialized when the Select function for Input 2 is changed.
Input circuit error alarm set value [Engineering Mode: Function block No. 58
(
Fn58
)]
Parameter symbol
Data range
Factory set value
r
I C A
0 to Input 1_Input span
0: No function
[Varies with the setting of the Decimal point position.]
TC/RTD inputs: 10
V/I inputs: 5% of Input 1_
Input span
To display “Input circuit error alarm set value”, choose “Input circuit error alarm”
in Function block No. 58: Select function for Input 2 (Engineering mode).
Summary of Contents for SC-F71
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Page 18: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 17 Differential temperature control ...
Page 114: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 113 Setting procedure ...
Page 131: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 130 Setting procedure ...
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Page 293: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 292 Checking PID values ...
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