Configuring Remote Drop Parameters

Introduction

In the Control Expert Parameters dialog, you can:

define or verify address information about the adapter module (name, IP address, and subnetwork mask)
specify a hold-up time interval
specify I/O refresh rates

Access the Parameter Dialog

To access the Parameters dialog in Control Expert:

Step	Action	Comment
1	Expand (+) EIO Bus in the Control Expert Project Browser.	Project Browser > Configuration > EIO Bus > Modicon M580 remote drop > Installed BMX/BME rack
2	Double-click the installed adapter.	The X80 performance EIO adapter window appears.
3	Select the Parameter tab.	The Parameter dialog appears.

Parameter Descriptions

Address information parameters:

Parameter	Comment
Device Name	The name of the adapter module includes a fixed prefix and a number provided by the rotary switch. Valid names conform to this structure: BM•CRA_xxx, where xxx equals the 3-digit value selected on the rotary switch. When the adapter is placed in the remote drop, the number is set to the device number. The device number does not change if the device moves to a new location. Each adapter needs to be assigned a unique number within the application. A message like this appears when analysis reveals a duplicate number: `{EIO Bus (2) BME CRA 312 00}: Device name is not unique`
IP Address	You cannot edit the IP address and sub network (mask) fields. NOTE: The IP address is editable only in the IP Configuration tab of the CPU module. The value for sub network is deduced from the CPU sub-network mask.
Sub Network

Parameter

Comment

Device Name

The name of the adapter module includes a fixed prefix and a number provided by the rotary switch. Valid names conform to this structure: BM•CRA_xxx, where xxx equals the 3-digit value selected on the rotary switch.

When the adapter is placed in the remote drop, the number is set to the device number. The device number does not change if the device moves to a new location.

Each adapter needs to be assigned a unique number within the application. A message like this appears when analysis reveals a duplicate number:

{EIO Bus (2) BME CRA 312 00}: Device name is not unique

IP Address

You cannot edit the IP address and sub network (mask) fields.

NOTE: The IP address is editable only in the IP Configuration tab of the CPU module. The value for sub network is deduced from the CPU sub-network mask.

Sub Network

Edit the Device Name in Control Expert:

Step	Action
1	In the X80 performance EIO adapter window, select the Parameter tab.
2	Click the Update IP/DHCP configuration hyperlink. NOTE: An Ethernet Network table that lists all RIO drops in the system appears.
3	Double-click the arrow in the Identifier column matching the desired RIO drop in the BME•58_ECPU_EXT column.
4	Edit the Device Name in the Identifier field to reflect the new name
5	Close the Ethernet Network window and validate your project.

Hold up time parameter:

Parameter	Comment
Hold up time	The hold up time represents the time (ms) that device outputs are maintained in their current states after a communication disruption and before taking their fallback values: default value: 1000 ms valid value range: 50...65,530 ms

Parameter

Comment

Hold up time

The hold up time represents the time (ms) that device outputs are maintained in their current states after a communication disruption and before taking their fallback values:

default value: 1000 ms
valid value range: 50...65,530 ms

If you assign a hold up time value that is less than the recommended minimum value, an I/O module may move to its fallback state. When communications are restored, the I/O module restarts and may not operate as anticipated.

There is only one hold up time for an RIO drop (not one for each task) based on the watchdog value.

One RPI per task = task period/2

WARNING

UNINTENDED EQUIPMENT OPERATION

Do not configure a holdup time value that is less than the recommended minimum values, which are:

for a periodic application: 6 x PAC scan time
for a cyclic application: configured watchdog value

Failure to follow these instructions can result in death, serious injury, or equipment damage.

Connection parameter:

Parameter	Comment
Custom RPI	Select this to configure the CRA->Scanner RPI setting.
CRA->Scanner RPI	Inputs: The RPI is the input refresh rate at which the adapter module sends inputs to the CPU with Ethernet I/O scanner service. The RPI is set in the subscribe field for the adapter on the remote I/O drop: periodic mode: default value = 1/2 MAST period. cyclic mode: default value = 1/4 watchdog timeout period.
Scanner->CRA RPI	Outputs: Outputs are passed from the CPU with Ethernet I/O scanner service to the adapter. The default values are: periodic mode: default value = 1.1 * MAST period. cyclic mode: default value = 1/4 * watchdog timeout period. You cannot edit this value. The outputs are published synchronously or immediately at the end of the current MAST task. NOTE: 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.

Parameter

Comment

Custom RPI

Select this to configure the CRA->Scanner RPI setting.

CRA->Scanner RPI

Inputs: The RPI is the input refresh rate at which the adapter module sends inputs to the CPU with Ethernet I/O scanner service. The RPI is set in the subscribe field for the adapter on the remote I/O drop:

periodic mode: default value = 1/2 MAST period.
cyclic mode: default value = 1/4 watchdog timeout period.

Scanner->CRA RPI

Outputs: Outputs are passed from the CPU with Ethernet I/O scanner service to the adapter. The default values are:

periodic mode: default value = 1.1 * MAST period.
cyclic mode: default value = 1/4 * watchdog timeout period.

You cannot edit this value. The outputs are published synchronously or immediately at the end of the current MAST task.

NOTE: 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.

NOTE:

When the Periodic mode is selected for the MAST task, 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).
When Cyclic mode is selected for the MAST task, the outputs are sent upon the completion of the task. The Watch Dog value (10 ... 1500 ms, increment: 10 ms, default = 250 ms) should be greater than the execution time.

LL984 Function Blocks

Quantum RIO drops that are used in a Modicon M580 system can use LL984 function blocks. For details, refer to Unity Pro Enhanced LL984 Block Library.