Issue
How many messages are buffered on a 7798xx / 7793xx / 7791xx?
Maximum number of the Message which can be stored on I/SITE locally?
Environment
I/NET Seven
7798, 7798B, 7798B1 and 7798C (I/SITE LAN) (SLI)
Cause
Even though every device in the system contains a message queue, only a few of the devices will successfully buffer the queued messages for later distribution. All controllers and Taps distribute messages out of their RS485 port even with the absence of any LAN communication. This is due to the fact that there is no requirement for an acknowledgment to be received at the generating device. The RS485 LAN is for both solicited and unsolicited message traffic. The only devices that perform extended buffering are the ones which directly communicate to polling devices such as the 7801 Taps, 7803 Taps, 7804 Taps, and all DPUs/SCUs. The MRs, ASCs, and UCs do not generate messages; messages relating to these devices are generated by the relevant MRI, MCI, etc.
Resolution
- Controller software prior to I/NET version 2.xx = approximately 150 messages.
-
Controller software for I/NET version 2.0
- Without emulated tap: 100 Messages
- With emulated tap: 1000 Messages.
