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CHAPTER 10 DEDICATED INSTRUCTIONS
10
10.4 JP/GP.READ (Reading Data from the Programmable Controller on Another Station)
(b) Start device of the target station where data to be read is stored
If the device setting in PLC Parameter is different between the own and target stations, use "(S2)" (with double-
quotation marks) to specify.
(c) Start device of the own station where read data is stored
Specify the own station's start device (D1), within the available range so that the read data can be stored.
When the area addressed D150 or higher of the own station CPU is already used
(2) Function
(a) READ instruction overview
The instruction reads data by the specified number of words (control data ((S1)+9)) from the target station start
device (S2) into the own station word devices (after (D1)).
Specify the target stations in control data ((S1)+4 and (S1)+5).
When the reading from devices of the target station is completed, the completion device (D2) turns on.
(b) Target stations which can be specified
For details on target stations which can be specified, refer to the following.
( Page 152, Section 10.1 (1))
Ex.
Correct
(D50 is specified in (D1).)
Incorrect
(D100 is specified in (D1).)
D50
D0
D99
D0
D99
100 words100 words
D100
D150
D199
D149
D150
Own station CPU Other station CPU Own station CPU Other station CPU
: Data to be read with READ instruction
: Area already used by own station's CPU
: Duplicated area
Channel 1
Channel 2
READ
Safety CPU module CPU module Network moduleMaster/local module
(D1) (S2)
[Own station] [Target station]