Configuring Analog Output Channels for the BMEAHO0412
Original instructions
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Analog Output Channels
The BMEAHO0412 HART analog output module includes 4 output channels. To open the module for configuration in Control Expert, double-click the output module in the PLC Bus:
Channel Parameters
To configure an output channel, select that channel on the left side of the configuration dialog. You can edit the following parameters for each of the 4 channels:
Parameter
Description
Symbol
(Read only) Displays the variable that has been associated with this channel.
Range
(Read only) Displays the current loop range of 4...20 mA.
Scale
Click in this field to open the following dialog where you can input scaling and overflow parameters:
Scaling: 0%:
Input the percentage scaling value for 4 mA current (default = 0).
Scaling: 100%:
Input the percentage scaling value for 20 mA current (default = 10,000).
Overflow: Below
The threshold between the lower tolerance area and the underflow area (default = –800).
Overflow: Below (checkbox)
The status of underflow control:
  • Selected = enabled (default)
  • De-selected = disabled
Overflow: Above
The threshold between the upper tolerance area and the overflow area (default = 10,300).
Overflow: Above (checkbox)
The status of overflow control:
  • Selected = enabled (default)
  • De-selected = disabled
Fallback
Use this checkbox to specify the behavior of the output when the PLC is in STOP mode or if communication between the PLC and the output module has stopped:
  • Selected: the value specified in the Fallback Value parameter is assigned to the output.
  • De-selected: the output maintains its value.
Fallback value
If the Fallback parameter is selected, this value is assigned to the output on fallback. The range of available values is defined by the 0%...100% scaling settings.
Wiring Ctrl
The wiring control function checks for a broken wire. Use the checkbox to activate and de-activate wiring control, as follows:
  • Selected = wiring control is enabled
  • De-selected = wiring control is disabled (default)