Xinje XD Series User Manual page 361

Q8: Check and change the button battery in the PCB of PLC
A8:
The rated voltage of button battery is 3V. The voltage can be measured by multimeter. If the
value of power-loss retentive register is very large, it means the battery is low. Please change
the button battery. Users can use SM5 and SD5 to detect the power of button batteries in
order to facilitate timely replacement of batteries. See Appendix 1 and Appendix 2 for details.
Q9: Communicate with SCADA software
A9:
If there is no choice for XD/XL series PLC in SCADA software, please choose Modbus-RTU
protocol and communicate through RS485 port. Please refer to XD/XL series PLC instruction
manual chapter 6.
Q10: MODBUS Communication
A10:
First of all, please ensure that the A and B terminals on the PLC are correctly connected with
the RS485 communication terminals of other devices. To modify the parameters of the PORT
2 of the PLC, the following methods are adopted:
Method 1: Configuration by configuration parameter instruction
For specific instructions, please refer to Chapter 6, Communication Functions of this manual.
The communication parameter settings of different devices are generally different, so it is
important to choose the correct frequency setting mode of communication devices, make clear
the corresponding MODBUS communication address and function code, and some
communication devices need a given operation signal before displaying the setting frequency.
Method 2: Configuration through control panel (refer to Chapter 6 Communication Function
of this manual for specific configuration method).
Q11: The LED light of XD/XL series PLC (PWR/RUN/ERR)
A11:
LED light
PWR shining, other
LED off.
Three LED all OFF
Problem
1. I/O PCB has short circuit
2. load is too large for 24V
3. not click RUN for program
1. PLC input power supply has
short circuit
2. PLC power PCB damaged
360
M0 is ON, Y will keep outputting
M1 is ON, Y0 is OFF
Solution
Check I/O terminal, if there is
short circuit. If the load is too
large for 24V power supply.
Make sure the program is
running inside PLC. Contact us
for help.
Check the input power supply of
PLC. Contact us for help.