User Manual

20) QCMT: Used to stop cyclical obtaining of a level meter.
Option The DME's ACKs when it succeeds The DME's ACKs when it fails
QCMT 0 [index] [a meter value] QCMT OK QCMT ERR
The command name stands for "Quit Cyclic Meter".
It will be used to cancel cyclic transmission of a level meter registered in the DME with the GCMT command.
- The first option will always take "0." It is reserved for future extensions to the command.
- [index] will have an appropriate number assigned with the DME Designer by a character string.
- "0" should be always assigned to [a meter number].
- One or more spaces are needed between the command and the option, and between the options.
E.g.) To discard registration of an obtained meter cycle:
QCMT 0 1 0
The DME will return a one-line character string of "QCMT OK" if it succeeds.
The DME will return a one-line character string of "QCMT ERR" if it fails.
E.g.) ACK when it succeeds in discarding meter number registration.
QCMT OK
ACK when it fails in discarding meter number registration.
QCMT ERR
21) SMC: Used to set the cyclical period for automatically obtaining all level meters.
Option The DME's ACKs when it succeeds The DME's ACKs when it fails
SMC 0 [a cycle] SMC OK SMC ERR
The command name stands for "Set Meter Cycle".
This command will enable the user to set a cycle in ms units for sending all level meters set to be obtained cyclically.
The DME will send level meters at 100 msec intervals if the DME has not received this command.
- The first option will always take "0." It is reserved for future extensions to the command.
- The meter transmission interval from the DME should be assigned to [a cycle] in ms units.
- One or more spaces are needed between the command and the option, and between the options.
E.g.) To change the meter transmission interval from the DME to 200msec:
SMC 0 200
- The DME will return a one-line character string of "SMC OK" if it succeeds.
- The DME will return a one-line character string of "SMC ERR" if it fails.
E.g.) ACK when it succeeds in changing the meter transmission interval:
SMC OK
ACK when it fails in changing the meter transmission interval:
SMC ER
R
Guide for setting the cycle
An appropriate cycle needs to be set in accordance with the number of the level meters to be obtained cyclically.
Follow the table below to find an appropriate cycle.
A table of the number of the level meters and the required time to be obtained
The sum of "Required time to be obtained" in the table above for each command will be the guide for setting an appropriate cycle.
The cycle to automatically obtain a level meter, however, should be set to at least at 50 msec, since too short of a cycle will
increase the load of the communication line.
Required time
to be obtained
Number of level meters to be
obtained by a single command
239ms
122ms
9ms
64
32
1
64ms
34ms
20ms
12ms
16
8
4
2
DME Remote Control Protocol Specifications V3.1
13