4-33
Section 4 Software Interface
4-3 Analog Input/Output Module
Analog input
current (mA)
Digital output value
(INT type)
16400
16000
-400
20 20.4
Gain value
0
0
0.5
Analog input
current (mA)
Digital output value
(INT type)
4125
4000
-1000
-1125
20 20.4
Gain value
0.5
Offset value
Offset value
Gain: 4000
Offset: -1000
Set values
<Example of scaling>
<Procedure for scaling>
1) Input “30000” to the parameter setting request register to activate parameter mode. (Make sure that the status register is
“30001”.)
2) Input gain and offset values to the parameter setting data register, and set ON bit 5 and bit 8 (in the case of channel 1) of
the parameter type setting register.
(In the above example of scaling, set as follows.)
3) Make sure that bit 5 (scaling parameter write mode) and bit 8 (channel 1) of the parameter type setting register are set ON.
4) Set OFF all the bits of the parameter type setting register, and clear all the bits of the parameter setting data register to
zero. This completes the operation for adjustment.
<Scaling for analog output>
The analog output converts the digital values that are input to them by application program into analog values. The operation to
change the width (scale) of input digital values is referred to as “scaling”. The available range of scaling of these modules is
-25000 to 25000 (INT type). If a value that is out of this range is set, it will be limited to -25000 or 25000.
<Initial value of scaling for each output range>
15(F) 0
+7
+6
-1000
4000
Output range Initial value of scaling Available range of scaling (See note.)
0 to 5 V 0 to 16000 0 to 25000
1 to 5 V 0 to 16000 0 to 25000
0 to 10 V 0 to 16000 0 to 25000
-10 to 10 V -8000 to 8000 -25000 to 25000
4 to 20 mA 0 to 16000 0 to 25000
0 to 20 mA 0 to 16000 0 to 25000
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