Data Protocol; Detailed Description Of Communication Via Serial Line; Relay, Tare - Orbit Merret OM 402UNI Manual

The instruments communicate via serial line RS232 or RS485. For communication they use the ASCII protocol. Communica-
tion runs in the following format:
ASCII: 8 bit, no parity, one stop bit
DIN MessBus: 7 bit, even parity, one stop bit
The transfer rate is adjustable in the instrument menu. The instrument address is set in the instrument menu in the range of
0 ÷ 31. The manufacture setting always presets the ASCII protocol, rate of 9600 Baud, address 00. The type of line used
- RS232 / RS485 - is determined by an output board automatically identified by the instrument.
The commands are described in specification you can find at www.orbit.merret.cz/rs.

DETAILED DESCRIPTION OF COMMUNICATION VIA SERIAL LINE

Activity
Data solicitation (PC)
Data transmission (Instrument)
Command confi rm. (Instr.) - OK
Command confi rm. (Instr.) - Bad
Instrument identifi cation
HW identifi cation
One-time measurement
Repeated measurement
LEGEND
# 35 23 Command beginning
H
Two signs of instrument address
A A 0...31
(sent in ASCII - tens and ones, e.g.
"01", "99" universal
<CR> 13 0D Carriage return
H
<SP> 32 20 Space
H
Data - usually signs "0"..."9", "-",
D "."; (D) - DP. and (-) may prolong
data
R 50 ...57 Relay and Tare status
H H
Positive command confi rmation
! 33 21
(ok)
H
Negative command confi rmation
? 63 3F
(bad)
H
> 62 3E Beginning of the data transmitted
H
Data transferred
# A A <CR>
> R <SP> D
! A A <CR>
? A A <CR>
# A A 1Y
# A A 1Z
# A A 7X
# A A 8X

DATA PROTOCOL

D D D D
<CR>
<CR>
<CR>
<CR>

RELAY, TARE

Sign Relay 1 Relay 2
P 0 0
Q 1 0
R 0 1
S 1 1
T 0 0
U 1 0
V 0 1
W 1 1
p 0 0
q 1 0
r 0 1
s 1 1
t 0 0
u 1 0
v 0 1
w 1 1
INSTRUCTIONS FOR USE OM 402UNI
(D) (D) <CR>
Change
Tare
relay 3/4
0 0
0 0
0 0
0 0
1 0
1 0
1 0
1 0
0 1
0 1
0 1
0 1
1 1
1 1
1 1
1 1
|
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