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5.4 Network Dedicated Instruction
5.4.16 ZNRD instruction
5-193
J_ZNRD
5
MODULE DEDICATED
INSTRUCTION
J_ZNRD
Function
This instruction reads data from devices of a programmable controller CPU on another station.
(In units of words)
1. Specify devices of the target station's CPU within the range allowed for the host
station CPU when reading data from the devices with the ZNRD instruction.
(Target station's start device number
where data to be read are stored)
+ (Read points - 1) (End device No. of host station's CPU
*1
)
*1
End device No. of the device in the host station CPU, and whose device name is same as in
2. Specify the host station's start device number within the range allowed for
storing
read data.
(Example) When D150 and after the area in the host station's CPU has been
already used
s1
s1
d1
D50
D0
D99
D0
D99
100 words100 words
D100
D150
D199
D149
D150
Host station CPU Other station CPU Host station CPU Other station CPU
: Data to be read with ZNRD instruction
: Area already used by host station CPU
: Duplicated area
Good example (D50 is specified in ( ).) Bad example (D100 is specified in ( ).)