Pid m – IDEC MicroSmart Pentra User Manual
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ONFIGURING
PID M
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C5A MicroSmart PID Module User’s Manual FC9Y-B1283
6-23
When the cascade control is used, the output CH1 is unused. When the output type is current, the output CH1
is 4 mA. When the output type is voltage, the output CH1 is 0 V. When the output type is relay, Output CH1 is
turned off. When heating/cooling control is enabled, output CH1 is used as the cooling output.
Output manipulated variable (MV) (0 to 100%) of the master (CH1) is converted using the external SP input
linear conversion minimum and maximum values and is used as the set point (SP) of the slave (CH0).
Example: When the external SP input linear conversion minimum value is 0°C and the external SP input linear
conversion maximum value is 1000°C, the set point (SP) of the slave (CH0) is decided as follows:
When master (CH1) output manipulated variable (MV) is 0%: 0°C
When master (CH1) output manipulated variable (MV) is 50%: 500°C
When master (CH1) output manipulated variable (MV) is 100%: 1000°C
Combination of Input CH0 and Input CH1 Functions
The possible combinations of Input CH0 and CH1 Functions are shown below. (O: Possible, X: Impossible)
Input CH0
Input CH1
Input CH1
Difference
(CH0-CH1)
Difference
(CH1-CH0)
Addition
(CH0+CH1)
External
SP Input
Cascade
Control
Input CH0
O
O
O
O
O
O
Difference (CH0-CH1)
O
O
O
O
X
X
Difference (CH1-CH0)
O
O
O
O
X
X
Addition (CH0+CH1)
O
O
O
O
X
X
(3) Control Register+57: Output CH0 Function
The one of the following output functions can be selected as the Output CH0 Function.
Output (CH0): The output of the CH0 control is outputted from output CH0
Output (CH1): The output of the CH0 control is outputted from output CH1
When Output (CH1) is selected, CH1 parameters are used for the control period and the output manipulated
variable (MV) upper and lower limits. CH0 parameters are used for all other parameters, such as the output
manipulated variable rate-of-change, output on/off hysteresis, and manual mode output manipulated variable.
When Output (CH1) is selected, output CH0 is unused. When output type is relay, the output CH0 is turned off.
When output type is voltage/current, output CH0 is 0V/4mA.
Both Outputs (CH0, CH1): The output of the CH0 control is outputted from both outputs CH0 and CH1
The control period and output manipulated variable (MV) upper and lower limits of CH0 and CH1 are used for
the corresponding output. CH0 parameters are used for all other parameters, such as, the output manipulated
variable rate-of-change, output on/off hysteresis, and manual mode output manipulated variable.
(4) Control Register+134: Output CH1 Function
Output (CH1) is always selected as Output CH1 Function. The output of the CH1 control is outputted from
output CH1. Output CH0 Function has priority.