Appendix 5 common question A&Q
Appendix 5 common question A&Q
The following are the common questions may happen when using the PLC.
Q1
:
why the coil is not set when the condition is satisfied?
A1
:
the probable reasons:
(
1
)
use one coil for many times, double coils output, the later coil has priority.
(
2
)
some conditions reset the coil, please use monitor function to find the reset point and
modify the program.
Q2
:
set on the pulse output instruction, the pulse doesn’t output?
A2
:
there are many pulse output instructions in the program.
Q3
:
why connect the high speed counter but no counter value?
A3
:
the probable reasons:
(
1
)
make sure the PLC has high speed counter photo-couplers.
(
2
)
when the PLC hardware version is 2.5 and software version is 3.0, it is not available to
use HSC, please update the hardware version to 3.0.
Q4
:
What’s the difference between com1 and com2?
A4
:
the communication parameters of com1 and com2 can set by users. The difference is com1
can return to default parameters by stop PLC after power on.
Q5
:
Why free format communication is failure?
A5
:
check the communication parameters, if use com2, please set the FD8220 to HFF, FD8221 set
to corresponding parameters.
Q6
:
Why the real time clock (RTC) cannot work
A6
:
XC3-14 and XP1 do not have RTC function.
Q7
:
Why PLC cannot communicate with other device
A7
:
the probable reasons:
(1) Communication parameters: PLC com port and device parameters must be the same.
(2) Communication cable: Make sure connection is correct and good.
(3) Communication serial port: check the serial port, download the PLC program, if download
successful the serial port is no problem.
(4) Ask manufacturer for help.
Q8
:
How long can the PLC battery are used?
A8
:
for 3-5 years.
Q9
:
why the temperature fluctuates serious under normal temperature when connecting the
thermocouple with the temperature module?
A9
:
the probable reasons:
Содержание XC Series
Страница 1: ...WUXI XINJE ELECTRIC CO LTD XC series PLC hardware User manual Data No PC01 20110106 3 3 ...
Страница 4: ......
Страница 41: ...3 System Structure Analog Output QD QD1000 QD1031 16 channels Module s Value D D8320 D8329 ...
Страница 43: ...3 System Structure Please install the products according to chapter 2 1 1 3 Installation Environment ...
Страница 49: ...5 Input Specifications and Wiring Methods 5 2 DC Input Signal AC Power Supply Type DC Input Signal 1 ...
Страница 51: ...5 Input Specifications and Wiring Methods ...
Страница 125: ...Appendix special soft device list 1 If you change special FLASH memory it will take into effect after restart the PLC ...