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MX4428 MXP Engineering /Technical Manual Document: LT0273
MXP Diagnostic Terminal
Page 8-6 24 March 2006 Issue 1.5
8.1.6 ANALOG LOOP DIAGNOSTICS
8.1.6.1 TC Command (Total Counts)
This command gives totals of node failures and powerups on the analog loop. See the EC
command to get values broken down to individual devices.
>>tc
Transmit echo reception fail count 5
Total reply fail count 191
Total device powerups 0
“Transmit echo reception fail count” indicates the number of times the MXP has been unable
to receive its own transmission on the analog loop. This should normally increment only
when the loop is subjected to abnormal events, e.g. shorts. This value is not cleared when
the MXP powers up, it is only cleared by the RS command.
“Total reply fail count” increments when a device does not reply to a poll, but has not already
been deemed to have failed. When a device is removed this value will increment by 12. This
value is not cleared when the MXP powers up, it is only cleared by the RS command.
“Total device powerups” increments when a device powers up. This should normally
increment by one for each device when the loop first powers up, and by one each time a
detector is plugged into a base with the loop powered up. If it increments at other times it is
indicative of a problem which requires investigation. This value is set to zero when the MXP
powers up.
8.1.6.2 EC Command (Error Counts)
This command gives total error counts as per the TC command, and then also gives the
reply fail counts for individual devices, and an indication of whether each device is deemed
to be in “scan fail”. These individual counts are not cleared when the MXP powers up, but
are reset by the RS command.
This command is also useful to determine which points are configured and what their type is.
>>ec
Transmit echo reception fail count 5
Total reply fail count 191
Total device powerups 0
Individual reply fail counts...
Point 1 Photo/Heat, 17 Scan Fail
Point 2 CO/Heat, 0
Point 3 Heat Only, 0
Point 20 Ionisation, 0
Point 21 MIM, 0
Point 22 CP, 0
Point 23 CIM, 54
Point 24 RIM, 54
Point 25 DIM, 24
Point 26 SNM, 54
8.1.6.3 RS Command (Reset)
This command resets (sets to zero) all the counters displayed by the TC and EC commands.