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WI-GTWY-9-xxx Wireless Gateway V1.18
137
4.16
Access to Message Buffer Count
The number of messages in buffers is stored in I/O registers for access from the data bus. This
provides a powerful diagnostics feature for troubleshooting busy systems. The number of “free”
messages is also provided - this is the amount of space available in the message buffers.
I/O Reg
Description
4350 – Number of Free COS (change-of-state) messages (max. is 1500)
4351 – Number of Free Block Messages (for queuing block mappings and repeated messages –
max. is 200)
4352 – Number of Free Ack Messages (max. is 10)
4353 – Number of Free “Rx Messages for Ethernet Monitor Comms only” (Max is 20)
4354 – Repeater messages queue (number of queued messages to be Repeated waiting to be sent)
4355 – Block Message queue (number of block mappings queued waiting to be sent)
4356 – COS Message queue (number of COS messages queued waiting to be sent)
4357 – Update Message queue (number of update messages queued waiting to be sent)
4358 – ACK queue (number of ACK messages queued waiting to be sent)
4359 – Radio Data Change queue (number of COS received on radio waiting to be sent
through to fieldbus)
The following four are buffer empty alarms (i.e. hex 0000 for OK, hex FFFF for buffer empty)
4360 – Free COS message buffer empty alarm (i.e. triggered when reg 4350 is 0)
4361 – This register counts the number of times the above alarm has been triggered
4362 – Free Block message buffer empty alarm (i.e. triggered when reg 4351 is 0)
4363 - This register counts the number of times the above alarm has been triggered
4364 - Free COS buffers empty latch.
4365 – Free Block Message empty latch