Operation via the Serial Interface (SCI):
Through the serial interface, measurement values can be issued singly or automatically by the GM 80.
The commands can be sent to the GM 80 via a terminal program or PLC.
If several devices are connected to the RS232-BUS, none of the devices should be operated in the SCI-mode “AUTO”.
Protocol set-up
0x02
0xXX
"x"
(STX)
Address
Command
At the device with address 0x00 all parameters (company header, sensor designation...) are issued when changing into the
measuring mode. If these parameters are not indicated, an address unequal 0x00 has to be
adjusted.
If the GM 80 is in the measuring mode, following commands are available:
ASCII HEX
Description
0
0x30 Query continuous measured value (signed integer)
1
0x31 Query maximal value (signed integer)
2
0x32 Query minimal value (signed integer)
3
0x33 Tare display
4
0x34 Reset maximal value
5
0x35 Reset minimal value
6
0x36 Actuate calibration control for sensors with 100 % control resistance
7
0x37 Switch off calibration control for sensors with 100 % control resistance
A
0x41 Read-Out datalogger
B
0x42 Delete datalogger
C
0x43 Read-Out current sensor parameter
D
0x44 Read-Out status
E
0x45 Read-Out complete status
g
0x67 Change protocol setup
k
0x6B ENTER
l
0x6C PLUS
m
0x6D MINUS
n
0x6E ESC
Outside of the measuring mode following commands are available:
ASCII
HEX Description
A
0x41 Read-Out datalogger
C
0x43 Read-Out current sensor parameter
D
0x44 Read-Out status
E
0x45 Read-Out complete status
a
0x61 Write time
b
0x62 Read-Out
time
c
0x63 Write company header
d
0x64 Read-Out company header
e
0x65 Write all sensor parameters
f
0x66 Read-Out all sensor parameters
g
0x67 Change protocol setup
k
0x6B ENTER
l
0x6C PLUS
m
0x6D MINUS
n
0x6E ESC
Read-out of present sensor parameter:
Sensor designation
8Byte
ASCII
Display final value
2Byte
packed BCD-figure
Unit 3Byte
ASCII