Analog Channel Parameters
Original instructions
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Overview
Parameters must be set for all of the analog channels before the module can be commissioned. This section provides the codes for setting the parameters and gives examples of parameter settings.
NOTE: If you set new parameters for the module, always send a complete set of parameters (all channels, inputs and outputs), even if you only want to change a single parameter. Otherwise the module will refuse the new parameters and continue working with the old ones.
Key
This section focuses on output words 1 and 2, as highlighted in the table below:
Word
Input Data
Output Data
1 = LSW
Value, input channel 1
Parameters for input channels 1 ... 4
2
Value, input channel 2
Parameters for output channels 1 ... 2
3
Value, input channel 3
Not used
4
Value, input channel 4
Not used
5 = MSW
Value, input channel 5
Not used
Illustration
Parameters are set by entering a four-bit code in output words 1 and 2, as follows:
Codes for Analog Input Parameters
Use the following codes to set the parameters for each analog input channel:
Code (binary)
Code (hex)
Parameter
0100
4
Channel inactive
0010
2
+/-5V or +/-20mA input range
0011
3
+/-10V input range
1010
A
1 ... 5V or 4 ... 20 mA input range
Example of Analog Input Parameters
If output word 1 is initialized as A324 hex, then the input channels have the following parameters:
Channel
Parameter
1
Disabled
2
at +/- 5 V
3
at +/- 10 V
4
at 1 ... 5 V
Codes for Analog Output Parameters
Use the following codes to set the codes for each analog output channel. The remaining bit combinations are reserved.
Code (Binary)
Code (Hex)
Parameter
Reset Behavior of Outputs
0 1 0 0
4
Channel inactive
0 V / 0 mA
0 0 0 1
1
0 ... 20 mA
0 mA
0 0 1 1
3
+ / - 10 VDC
0 V
0 1 0 1
5
0 ... 20 mA
20 mA
0 1 1 1
7
+ / - 10 VDC
+ 10 VDC
1 0 0 1
9
0 ... 20 mA
Output is held
1 0 1 1
B
+ / - 10 VDC
Output is held
Example of Analog Output Parameters
If output word 2 is initialized as 0091 hex, then the output channels have the following parameters:
Channel
Parameter
1
0 ... 20 mA with reset to 0
2
0 ... 20 mA with reset to hold