Maximum Outstanding Messages
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 |
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.