SECTION 7.0
ENHANCED REMOTE CONTROL COMMANDS
WITH RS-485
7.1
General
Please read the section on serial communications
first
to familiarize yourself to the command structure.
All commands under RS485 are either exactly the same or have slight enhancements over RS232C. This
section is devoted to specifying only the enhancements associated with the RS485 protocol.
Below is a sample 'H'elp Screen using the 'H' Command.
A I
Aa=bb.b[L/H] <Enter> Alarm set
L N
Bccccc <Enter> Baud rate select
P S
C[bb.b] <Enter> Calibrate
H T
D[string] <Enter> Disable Security
A R
E[string] <Enter> Enable Security
U
FSd=[ON/OFF/1/0] <Enter> Fail-safe select
O M
Gcommand <Enter> Global set (be careful here)
M E
H <Enter> Help Screen
E N
L[name] <Enter> Local Name OR Number
G T
M[name] <Enter> Manual clear toggle
A S
Q[name] <Enter> Quiet mode (no beeps at all)
S[name] <Enter> Signal mode (beeps audible)
U[name] <Enter> Use analyzer with 'name' for all cmds
V[name] <Enter> View current Alarms and settings
Where: a = 1, 2, or 3 for different alarms
bb.b = 0 to 30.0% CO2 for alarm setting
L/H = Optionally set to 'L'ow or 'H'igh alarm
ccccc = Baud rate number from 150 to 9600
d = Number designating Relay 1 to 4
ON/OFF/1/0 = 'ON' is the same as '1' etc.
name = String for accessing multiple units (see manual)
string = String for security protection (see manual)
command = Any valid command (WARNING: G will act on all units!)
You will notice that there are three new commands here. 'G'lobal, 'L'ocal, and 'U'se. The first one is the
'G' Command. As it states above, this is the 'G'lobal Set command. This command is very powerful and
must be discussed in detail.
RS485 gives the user the ability to connect multiple Series 9510 Carbon Dioxide Analyzer’s together and
communicate to them simultaneously. Therefore, it may become necessary or convenient to have certain
Setpoints be 'G'lobally set. Instead of setting all instruments up one by one, use the 'G'lobal Command to
control all Series 9510 Carbon Dioxide Analyzer units at the same time!
Each command will be discussed here, taking into consideration that there is most likely more than one
unit to be controlled over the RS485 communications lines (twisted pair).
ALPHA OMEGA INSTRUMENTS CORP.
SERIES 9510 CARBON DIOXIDE ANALYZER INSTRUCTION MANUAL
27
