5.3 Description of Function Codes 5.3.8 J codes (Applied functions)
[ 2 ] PID command by analog inputs (J02 = 1)
The desired value can be set for the PID command value by analog input by multiplying by the gain and adding the
bias. The polarity can be selected and the filter time constant and offset can be adjusted. In addition to J02 setting,
it is necessary to select PID process command 1 for analog input (function codes E61 to E63, E66). For details,
refer to the descriptions for function codes E61 to E63 and E66.
Table 5.3-23 Adjustable elements of PID command
Both the common bias and individual bias function.
Offsets (C31, C36, C41, C74)
C31, C36, C41 or C74 configures an offset for an analog voltage/current input. The offset also applies to signals
sent from the external equipment.
Filters (C33, C38, C43, C76)
C33, C38, C43 and C76 provide the filter time constants for the voltage and current of the analog input. The larger
the time constant, the slower the response. Specify the proper filter time constant taking into account the response
speed of the machine (load). If the input voltage fluctuates due to line noises, increase the time constant.
Polarity selection (C35, C45, C78)
C35, C45 and C78 configures the polarity and therefore the input range for analog input voltage.
Terminal [12], [V2], [C1] (V3 function) input specifications
0 to +10 V (Negative value of voltage is regarded as 0 V)
Range / polarity selection for terminal [C1] (C1 function) (C40)
C40 configures the input range for analog input current of terminal [C1] (C1 function).
This allows analog current input to be handled as bipolar data with 12 mA or 10 mA set to 0 by setting to 10 or 11,
and compensating with the gain and bias.
Handling when bias value is set to minus
4 to 20 mA (factory default)
Limit below 0 point with 0
Enable below 0 point as minus value.
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