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5.4 Network Dedicated Instruction
5.4.8 READ instruction
J_READ, G_READ
[7]
Number of resends
For instruction execution
Specify the number of instruction resends when the instruction is not
completed within the monitoring time specified in [8].
0 to 15 User
At instruction completion
The number of resends (result) is stored.
–
System
[8]
Arrival monitoring time
Specify the monitoring time required for the instruction completion.
If the instruction is not completed within this time, it is resent by the
number of times specified in [7].
0 to 32767 User
[9]
Read data length
Specify the number of read data.
1 to 8192 User
[10]
–
Reserved
– User
[11]
Clock set flag
*3
Valid/invalid status of the data in the area starting from [12] is stored.
0: Invalid
1: Valid
– System
[12]
to
[15]
Clock data at the time of
error completion
*3
Clock data at the time of error completion are stored in BCD format.
– System
[16]
Error-detected network No.
*3
Network number of the station where an error was detected is stored.
(However, when an error was detected at the host station, the network
number is not stored.)
1 to 239: Network number
– System
[17]
Error-detected station No.
*3
Number of the station where an error was detected is stored.
(However, when an error was detected at the host station, the network
number is not stored.)
– System
Device Item Setting data Setting range
Setting side
s1
s1
s1
s1
Description Setting value
Ethernet
0 to TCP retransmission
timer value: Monitoring is
performed by the TCP
retransmission timer value.
(TCP retransmission timer
value + 1) to 16383:
Monitoring time (unit:
second)
0 to 16383
MELSECNET/H
CC-Link IE
0: 10 seconds
1 to 32767: 1 to 32767
seconds
0 to 32767
s1
Description Setting value
Ethernet
MELSECNET/H
CC-Link IE Field Network
1 to 960
(word)
CC-Link IE Controller Network
1 to 8192
(word)
s1
s1
s1
s1
s1
b15 b8 b7to b0to
s1
s1
s1
s1
[12]
[13]
[14]
[15]
Month (01H to 12H)
Year (00
H
to 99
H
) Last two digits
Hour (00H to 23H) Day (01H to 31H)
Second (00
H to 59H)Minute (00
H to 59H)
Year (00
H
to 99
H
) First two digits
Day of week (00H to 06H)
00H (Sun.) to 06H (Sat.)
s1
s1
Setting value Description
MELSECNET/H 1 to 64
Ethernet
CC-Link IE Controller Network
1 to 120
CC-Link IE Field Network -
Master station 125 (7DH)
Local station or the intelligent device
station
1 to 120