Configuration tab 1756-OF4, 1756-OF8, integer

Use the
Configuration
 tab on the
Module Properties
 dialog to configure 1756-OF4 and 1756-OF8 non-isolated analog output modules operating in integer mode. The configuration information for the module is stored in the controller. The controller configures the module.
Use the
Configuration
tab to:
  • Select the channel to configure.
  • Select to hold the channel’s output value until the consumed output value is within 0.1% of the full-scale for Channel Data.
  • Configure the fault state.
  • Enter a user fault state value.
  • Enable ramping from the current output value to the Fault Value when a fault occurs at the rate limit.
  • Set a value for the output to transition to when the module enters Program State.
  • Specify output behavior if there is a communications failure in Program mode.
Parameters
Channel
Select one of the channel buttons to display its information on the Configuration tab.
Hold for Init
Check this box to cause the module to hold the output signal unchanged until the output value received from the controller is within 0.1% of full scale of the value being held. The output will hold when:
  • Power-up occurs (holds at zero)
  • A new connection is established (brings it out of fault state and it holds at the fault value from the previous configuration)
  • The controller returns to Run mode after Program mode (continues to hold at the configured value that was held in Program mode, see the
    Output State
     tab)
The output channel holding allows the controller to synchronize with the output, enabling smooth output transitions and avoiding rapid transients when control resumes from an interruption.
The output can be ramping to the configured hold value when the transition occurs. In this case, it continues the ramp until it completes or until the output value from the controller is within the 0.1% of the output signal. When the Hold for Initialization box is not checked, the output switches as quickly as possible to the first value commanded by the controller.
Fault State
Select the fault state.
  • Hold
     - The output channel remains at the last output value.
  • User
     - The output channel goes to a user-defined value if the connection is lost to the owner controller. If you select
    User
    , in the
    User Fault Value
    box, enter the user-defined value.
User Fault Value
If you selected
User
 in the
Fault State
 box, enter a value for the output to transition to if the module enters Fault State.
This field is disabled if you select
Hold
 in the
Fault State
 box.
Ramp to Fault
Select the box for each output point for which you want to enable ramping, at the ramp rate limit, from the current output value to the Fault Value if a fault occurs.
Two conditions must be set when configuring Ramp to Fault:
  • Fault State must be set to "User" to use a Fault Value on fault detection.
  • Maximum Ramp Rate must be a non-zero value.
If you select this box, the Rate Limit is your ramp rate.
This field is disabled if you select
Hold
 in the
Fault State
 box.
Program State
Select the program state.
  • Hold
     - The output channel remains at the last output value.
  • User
     - The output channel goes to a user-defined value if the connection is lost to the owner controller. If you select
    User
    , in the
    User Fault Value
    box, enter the user-defined value.
User Program Value
Enter a user-defined value for the output to transition to when the module enters Program State.
This field is disabled if you select
Hold
 in the
Program State
 box.
Ramp to Program
Select the box for each output point for which you want to enable ramping, at the current rate limit, from the current output value to the Program Value when a program command is received from the controller. Two conditions must be set when configuring Ramp to Program.
  • Program State must be set to "User" to a Program Value on the Program mode.
  • Maximum Ramp Rate must be a non-zero value.
If you select this box, the Ramp Rate Limit is your ramp rate.
This field is disabled if you select
Hold
 in the
Program State
 box.
Rate Limit (Counts/S)
Enter the maximum rate of change in the output signal for each output point. This field is expressed in counts per second. Ramping outputs are updated approximately every 35ms.
Communication Failure
Select what happens if communications fail in Program Mode.
  • Leave outputs in Program mode state
     - Do not transition outputs from existing program mode state.
  • Change output to Fault mode state
    - Ensure outputs are in configure Fault mode if a fault occurs.
OK
Select this button to accept your edits on any tab and close the dialog.
Cancel
Select this button to cancel your edits on any tab and close the dialog.
Apply
Select this button to apply your edits on any tab and continue editing.
If:
  • You are online in Program, Remote Program or Remote Run mode and,
  • This controller is the owner controller and,
  • You have changed the module’s configuration in the software,
when you select the Apply or the OK button, the information is automatically sent to the controller. The controller tries to send the information to the module (if the module’s connection is not inhibited). If you don’t select Apply, your changes are not sent to the controller.
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