RS-232 DF1 Device diagnostics
Diagnostic counters are available by right-clicking the processor station in the RSWho window. Driver diagnostics are found under the General and Performance tabs in the tabbed dialog. Driver diagnostics are modeless; therefore, they can remain on the desktop if you minimize RSLinx Classic. The following is the list of diagnostic counters shown and the definition of each.
General Tab | |
|---|---|
Bad Packets | Invalid Packets received. |
Timeouts | Packet timeouts. |
ACK/NAK Timeouts | Timeouts waiting for an ACK or NAK. |
Retries | Number of times packets had to be retried to reach destination. |
Retry Limit Exceeded | A packet was retried the maximum amount of times (currently three) and failed to reach the destination successfully. |
Write Errors | Failures sending commands to the kernel driver. |
Total Packets Sent | The total of Local Solicited Packets Sent and Remote Solicited Packets Sent. |
Reply Packets Received | Total replies received to both local and remote solicited packets sent. This
number should equal Total Solicited Packets Sent, but lags by a few packets
because replies are not back yet. |
Unmatched Reply Packets | The number of times a reply packet was received by RSLinx Classic to which there was no associated pending packet. |
Unsolicited Replies Sent | Total number of unsolicited messages that the RSLinx Classic engine replied to. This number usually equals Unsolicited Forwarded unless RSLinx Classic gets unsolicited messages that it does not understand and cannot forward to a client application or cannot reply to. |
Unsolicited Messages Received | Total number of unsolicited messages/commands received from stations on the same link as this one (local stations). These are messages that are sent to RSLinx Classic that are not sent to an RSLinx Classic Virtual Link. |
ENQs Sent | The PIC driver's station received a packet it did not understand and asked the sender to resend it. |
NAKs Received | A station on the network received an invalid packet. |
ENQs Received | A station on the network did not understand the packet it received. |
NAKs Sent | Negative Acknowledges sent. |
Packets In Queue | Packets in a queue waiting to be sent to the kernel driver. |
Packets Canceled | Total solicited packets that timed out in RSLinx Classic waiting for a reply. If a reply is received at a later time, the reply is disregarded. If this number is increasing at a steady rate, you are stressing this driver and/or communication interface hardware beyond its capacity. |
Performance Tab | |
|---|---|
Sent Packets/Second | Total packets sent (solicited and unsolicited) per second by user-mode driver. |
Received Packets/Second | Total packets received (solicited and unsolicited) per second by user-mode driver. |
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