The load also adds locking Function to prevent users' error.The title bar displays the
lock id.In locked state except [On/Off], [Enter], [Shift] + [
▶
] button, the rest of the buttons
including knobs are locked.In addition, in the lock state, the icon bar will appear lock icon,
icon disappear when unlocked.Long press [Enter] key with 3s can switch between lock and
unlock state.
2.14.2
External Interface Function
ET54 series is equipped with RS232 (optional) or 485 (optional) as well as two USB
communication interfaces, users can choose either interface to complete the communication
with the computer.
USB Interface:
After connecting the load and PC through USB public to public connection line, the
serial port software or upper computer can be used to communicate with the load at the PC
end. The configuration and communication mode are the same as RS232 interface mode
RS232/485 Interface:
Interface
PIN
PIN definition
Instruction
RS232
2
RXD
RS232 Interface
3
TXD
RS232 Interface
RS485
1
A
RS485 Interface
2
B
RS485 Interface
Public
5/6
GND
Instruction
Interface
4
PASS
Teat Result Level Input
7
NTRI
External Trigger Input
8
FAIL
Teat Result Level Input
9
RUN
Working Condition Level Input
Communication Interface Instruction
: Rs-232 or 485 interface support SCPI protocol,
SCPI command can be used for programming.When using RS232 or 485 interface for data
communication, relevant communication parameters should be well configured on PC and
load side. For example, the communication parameters of load can be configured on the
communication setting interface, as shown in figure 2.15.2.
Indicating interface Instruction:
test result output and running state indication, low
level output means effective, default output is high level 3.3v.For externally triggered input
