GM9907-L5
bulk scale controller user’s manual
- 17 -
4.4
COM Para.
GM9907 can provide two serial communication interfaces. For the connection of serial
interfaces, please refer to
Section 2.5
. You can select COM Para. On the
[Maintenance]
–[Communication]
page,For serial ports 1 and 2, you can choose modbus-RTU, print,
serial mode, command mode 1, serial mode 2, and command mode 3. The first serial port of
the meter is RS-232, and the second serial port of the meter is RS-485. Set the serial port
COM Para correctly. Only when it is consistent with the parameters of the upper computer
can it communicate.
COM Para.Description as follow
：
COM Para.
Items
Description
Serial ports
para.
(COM-232
；
COM-485
）
COM ID
Initial value
：
1
；
range
：
1~99
Protocol
Initial value
：
MODBUS-RTU;MODBUS
-
RTU
/
Print/Continuous
Send /Response Mode
-
1
/
Response
Mode
-
2
/
Response Mode
-
3
option
Baudrate
Initial value
：
38400
；
9600/19200/38400/57600/115200 option
Data format
Initial value
：
8-E-1(8
data bits
-
even check
-1
bit stop
bit)
；
8-E-1/8-N-1/7-E-1/7-N-1
(
Modbus-RTU
only
support 8 bit data bits)
MODBUS
DWORD
FORMAT
MODBUS
display
：
Initial value
：
AB-CD
；
Hi-Lo
（
AB-CD
）/
Lo-Hi
（
CD-AB
）
Ethernet
Config
Protocol
Modbus-TCP
，
Address refer section 3.4.6.3
Hi-Lo
Modbus communication display method
：
Initial value
：
AB-CD
(
Hi-Lo
)；
AB-CD
(
Hi-Lo
)/
CD-AB
(
Lo-Hi
)
Theoretical Calibration
Theoretical Calibration function is not convenient to use the weight calibration, but
there is a record of the weight calibration voltage value. The steps are as follows:
Step 1: Click
[Cal ZERO By Valtage]
on the balance calibration interface, enter
the recorded zero voltage value in the pop-up box, and click "
Enter
".
Step 2: Click
[Historical Weight Cal]
on the balance calibration interface, and
input the recorded gain millivolt and gain weight value in the cartridge to complete the
weightless calibration.
