Max Machinery 120 FLOW RATE & TOTAL INDICATOR - Manual (Page 22)

Page 22 120-200-350 © 1993 (Rev 5/97) Max Machinery, Inc.
Control Commands
All commands in the following tables are preceded by the start character (>) and unit number
and succeeded by the two character checksum and carriage return.
Command Response Description
RSTa A RESET COMMAND
where “a” determines functions
to be performed.
Digit “a” = 1 - Reset Totalizer
= 2 - Unlatch Totalizer Output
= 3 - Reset Totalizer and Unlatch Totalizer Output
= 4 - Unlatch Rate Alarms
= 5 - Reset Totalizer & Unlatch Rate Alarms
= 6 - Unlatch Totalizer Output & Rate Alarms
= 7 - Reset Totalizer, and Unlatch Totalizer Output and Rate Alarm
EPM A ENTER PROGRAM MODE
PEX A EXIT PROGRAM MODE
Query Run Data Commands
This classification of commands allows the computer to read run data information such as
status, count, rate, setpoint, etc. These commands are valid in run mode only, except for QST
(query status), which is valid in all modes of operation.
The following Query Run Data commands are supported:
Command Response Description
QST ASTabcd QUERY STATUS
where
a = Current Mode
= R - Run Mode
= P - Program Mode
b = Totalizer Output Status
= A - Output On
= N - Output Off
c = Rate High Alarm Status
= A - Alarm On
= N - No Alarm
d = Rate Low Alarm Status
= A - Alarm On
= N - No Alarm
QRT ARTaaaaaa QUERY RATE
where aaaaaa = Rate
RS-485 SERIAL COMMANDS