Xinje XD Series User Manual

38
Input processing
Before PLC executing the program, read every input terminal’s ON/OFF status to the image
area.
When the program is running, even the input changed, the content in the input image area will
not change until the next scanning period coming.
Output processing
After running all the instructions, transfer the ON/OFF status of output Y image area to the
output lock memory area. This will be the actual output of the PLC.
The output contactors will delay the action according to the output soft components reponse.
2-5 Auxiliary Relay (M, HM, SM)
The auxiliary relays in XD/XL series PLC are all in decimal form, please see the following
table:
Series
Name
Range
Normal
Power-off holding
Special
XD1/XD2/XD3
M
HM
SM
M0~M7999
HM0-HM959
SM0~SM2047
XD5/XDM/XDC/XD5E/XDME
M0~M69999
HM0-HM11999
SM0~SM4999
XDH
M0~M199999
HM0~HM19999
SM0~SM49999
XL1/XL3
M0~M7999
HM0-HM959
SM0~SM2047
XL5/XL5E/XLME
M0~M69999
HM0-HM11999
SM0~SM4999
XLH
M0~M199999
HM0~HM19999
SM0~SM49999
In PLC, auxiliary relays are used frequently. This type of relay’s coil is same to the output
relay. They are driven by soft components in PLC;
Auxiliary relays M and HM have countless normally ON/OFF contactors. They can be used
freely, but this type of contactors can’t drive the external loads.
 For common use
This type of auxiliary relays can be used only as normal auxiliary relays. I.e. if power supply
suddenly shut down during the running, the relays will be off.
Common usage relays can’t be used for power off retentive, but the zone can be modified;
 For Power Off Retentive Use
The auxiliary relays for power off retentive usage, even the PLC is OFF, they can keep the
ON/OFF status.
Power off retentive zone cannot be modified;
Power off retentive relays are usually used to memory the status before stop the power, then
when power the PLC on again, the status can run again;
 For Special Usage
Number List
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Xinje XD Series Specifications

General

Input Voltage	24V DC
Storage Temperature	-20°C to 70°C
Protection Class	IP20
Type	PLC
Series	XD
Programming Language	Ladder Logic, Instruction List
Communication Interface	RS232, RS485
Power Supply	24V DC
Digital Inputs	Available (number varies by model)
Digital Outputs	Available (number varies by model)
Analog Inputs	Available (number varies by model)
Analog Outputs	Available (number varies by model)
Output Type	Relay, Transistor
Number of Inputs	Varies by model (see Digital Inputs and Analog Inputs)
Number of Outputs	Varies by model (see Digital Outputs and Analog Outputs)
Operating Temperature	0°C to 50°C
Humidity	5% to 95% (non-condensing)