Configuring the Parameters
Original instructions
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Parameter Tab (X80 Remote Drop)
This topic describes the Control Expert Parameter tab for an X80 remote drop that includes a 140CRA31908 adapter module.
Access the Parameter Tab
Access the Parameter tab in Control Expert:
Step
Action
Comment
1
Expand (+) EIO Bus in the Control Expert Project Browser.
Path: Project Browser → EIO Bus → Quantum S908 remote drop.
2
In the EIO Bus, double-click the Quantum S908 remote drop.
The Quantum S908 remote drop window appears. It contains the parameter tabs for the drop.140CRA31908
3
Select the Parameter tab.
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Parameter Descriptions
Use the Control Expert Parameter tab to configure these parameters for the X80 remote drop.
Address information parameters:
Parameter
Comment
Device Name
The device name of the device includes a fixed device prefix and a number provided by the rotary switch. Valid device names conform to this structure (where QSA represents the 140CRA31908 module): 140QSA_xxx
Remember that xxx equals the three-digit value selected on the rotary switches, so the device name includes the device prefix (140QSA) plus that value.
When the device is placed on the X80 remote drop, the number is set to the device number. The device number does not change when the device moves to a new location.
Valid device numbers are unique within the application. A message like this appears when analysis reveals redundant device numbers:
{EIO Bus (2)140CRA31908): Device name is not unique
NOTE: The device number does not change if you move the remote drop, but you can modify the number. However, if you modify the number, the link breaks between the device name and the remote drop number. Schneider Electric recommends that you allow the remote drop number to equal the device name, even if it can be modified.
IP Address
The IP address of the 140CRA31908 module can be changed only from the Ethernet Network Manager. (In the Project Browser of your Control Expert application, double-click your Ethernet network to open the manager, or right-click Ethernet Network → Open.
Sub Network
Update IP/DHCP configuration
Click this link to view the Ethernet Network window.
Hold up time parameter:
Parameter
Comment
Hold up time
Valid values for the Hold up time are 50...65530 (ms). This value represents the time that device outputs are maintained in their current states after a communication disruption and before taking their fallback values.
The minimum holdup time differs for standalone and redundant systems. If you assign a holdup time value that is less than the recommended minimum value, you can send an I/O module to the fallback state. When communications are restored, the I/O module restarts and may not operate as anticipated.
WARNING
UNINTENDED EQUIPMENT OPERATION
Do not configure a holdup time value that is less than the recommended minimum value for standalone or redundant systems:
  • standalone systems:
    • periodic application: 4.4 x PLC scan time
    • cyclic application: configured watchdog value
  • redundant systems: configured watchdog value + PLC scan time
Failure to follow these instructions can result in death, serious injury, or equipment damage.
Connection parameter:
Parameter
Comment
Custom RPI
Select this check box to configure the CRA->CRP RPI value.
CRA->CPU RPI (inputs)
The RPI is the input refresh rate at which the 140CRA31908 module sends inputs to the CPU EIO scanner service. The RPI is set in the subscribe field for the 140CRA31908 module on the X80 remote drop.
  • periodic mode: default value = 1/2 MAST period
  • cyclic mode: default value = 1/4 MAST watchdog timeout period
  • valid values: 5 ...1500 (ms)
NOTE:
  • You can configure this value only when the Custom RPI check box is selected.
  • The minimum CRA->CRP RPI value is 5 ms.
CPU->CRA RPI (outputs)
(See note below.)
Outputs are passed from the CPU with EIO scanner service to the 140CRA31908 module. Set the output refresh rate with the Application Trigger value (CPU->CRA RPI) at the end of the CPU MAST task:
  • periodic mode: default value = 1.1 * MAST period. The output value is sent at the end of the actual MAST period.
  • cyclic mode: default value = 1/4 * watchdog timeout period. The output value is sent at the end of the actual MAST period.
You cannot edit this value. All outputs are published synchronously or at the execution of the MAST task:
  • synchronously: Outputs are published immediately at the end of the MAST task
  • execution of IU_ERIO: You can only generate outputs when you use the IU_ERIO function block.
NOTE:
  • periodic mode: When this mode is selected for the MAST task and configured to function, the Period value allows the complete execution of the logic. (The MAST can overrun when its execution time exceeds this value.) Valid values: 1...255 ms (increment: 1 ms).
  • cyclic mode: When this mode is selected for the MAST task, the outputs are sent upon the completion of the task. Use a Watch Dog value that is greater than the execution time. Valid values: 10...1500 ms (increment: 10 ms).
  • The default value for the watchdog timer is 250 ms. If the MAST task does not finish within the watchdog period, the process times out. If the watchdog is greater than 4 times the MAST period, the remote drops could switch to fallback while the CPU is running. For example, MAST period = 20 ms, logic execution = 90 ms, watchdog time = 100 ms.