If multiple messages is enabled, the following global parameter is used to define the maximum number of outstanding messages that can be sent.
|
S90TCP_MAX_POLL_MSG |
|
|
<PORT>_MAX_POLL_MSG |
|
|
<DEVICE>_MAX_POLL_MSG |
S90TCP_MAX_POLL_MSG
|
For |
Project |
|
Purpose |
To define the maximum number of outstanding messages that can be sent to all devices on all ports in the project. |
|
Value |
1 to 64 |
|
Default Value |
1 |
<PORT>_MAX_POLL_MSG
Where <PORT> is the number of the port.
|
For |
Port |
|
Purpose |
To define the maximum number of outstanding messages that can be sent to all devices on a specific port within the project. |
|
Value |
1 to 64 |
|
Default Value |
1 |
<DEVICE>_MAX_POLL_MSG
Where <DEVICE> is the name of the device.
|
For |
Device |
|
Purpose |
To define the maximum number of outstanding messages that can be sent to a specific device. |
|
Value |
1 to 64 |
|
Default Value |
1 |
The following table identifies the order of precedence for valid globals.
|
Global... |
Supercedes |
|
Device-level |
Port-level |
|
Port-level |
S90TCP-level |
|
S90TCP-level |
Default |
Note: As long as the communication load
is within the capability of the Series 90-70 (as it is configured
with the existing PLC application), communications remains reliable
without dropouts. If the communication load is beyond the
capability of the Series 90, then there may be loss of
communications or it may be observed that the Triplex interface
will switch between viable communication paths. If this occurs,
reduce the number of concurrent messages.
When confirming that the number of concurrent messages chosen is compatible with the PLC application, be sure to validate the application with the Series 90-70 in run mode running the complete PLC application.
|
|
Series 90 TCP/IP Triplex global parameters. |
