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Chapter 8 Communication Functions
8-63
•
S3 format is as below.
bit 15 bit 8 bit 1 bit 0
•
NDR : when the communication ends normally, this bit turns on during 1 scan.
•
Error bit : when communication error occurs, this bit turns on during 1 scan. At that time error code stores bit 8 ~ bit 15.
•
Error code is as follow
Code
Error type
Meaning
01
Illegal Function
Error in inputting function code in instruction.
02
Illegal Address
Error of exceeding the area limit of reading/writing on the slave station.
03
Illegal Data Value
Error when the data value to be read from or write on the slave station isn’t
allowed.
04
Slave Device Failure
Error status of the slave station.
05 Acknowledge
It’s a responding code of the slave station for the master station to prevent the
master station time-out error, when request command processing takes time.
The master station marks an error code and waits for a certain time without
making any second request.
06
Slave Device Busy
Error when request command processing takes too much time. The master
should request again.
07 Time
Out
Error when exceeds the time limit of the communication parameter as it
communicates.
08
Number Error
Errors when data is 0 or more than 256 bytes
09
Parameter Error
Error of setting parameters (mode, master/ slave)
10 Station
Error
Error when the station number of itself and the station number set by the
S1 of instruction are the same.
Error bit
NDR bit
Error code
Remark
-. In MASTER-K120S series, the ‘MODBUS’ command which has been used in MK80S series can be used.
In this case, communication channel is fixed to channel 0.
Содержание MASTER-K 120S Series
Страница 26: ...Chapter 4 Names of Parts 4 3 2 K7M DRT60U 3 K7M DT60U 4 1 2 40 points main unit Standard 1 K7M DR40U ...
Страница 27: ...Chapter 4 Names of Parts 4 4 2 K7M DRT40U 3 K7M DT40U 4 1 3 30 points main unit Standard 1 K7M DR30U ...
Страница 28: ...Chapter 4 Names of Parts 4 5 2 K7M DRT30U 3 K7M DT30U 4 1 4 20 points main unit Standard 1 K7M DR20U ...
Страница 29: ...Chapter 4 Names of Parts 4 6 2 K7M DRT20U 3 K7M DT20U 4 1 5 30 points main unit Economic 1 K7M DR30UE ...
Страница 138: ...Chapter 7 Usage of Various Functions 7 54 c Program ...
Страница 306: ...Appendix 3 External Dimensions App3 2 2 Slim type G7E DC08A G7E RY08A G7F ADHB G7F DA2V G7F RD2A ...