Delta Electronics DVPPF02-H2 - Manual (Page 10)

PROFIBUS DP Slave Communication Module DVPPF02-H2
DVP-PLC Application Manual 8
4.3 DFROM & DTO Instructions
1. DVP-EH2 PLC MPU reads or writes data in the CR of DVPPF02-H2 by using DFROM/DTO
instruction.
ST O P ST O P ST O P R UN R UN R UN
0 0 0 1 1 1 IN IN IN
O U T O U T O U T
P O W E R P O W E R P O W E R
R U N R U N R U N
E R R O R E R R O R E R R O R
B A T. L O W B A T. L O W B A T. L O W
DVP-20EH DVP-20EH DVP-20EH
x 1 6 x 1 6 x 1 6 0 0 0
x 1 6 x 1 6 x 1 6 1 1 1
Once DVPPF02-H2 is connected to DVP-EH2 through the connection port, DVP-EH2 will be able to read
or write the CR data in DVPPF02-H2 by using DFROM/DTO instruction. The data transmission between
DVPPF02-H2 and PROFIBUS DP master is done through PROFIBUS DP bus.
Note: Use DFROM/DTO instruction to read/write data instead of FROM/TO instruction.
2. DFROM & DTO instructions
API
78
DFROM
P
Read CR Data in Special Modules
Operands
：No. of special module ：CR# in special module to be read
：Device for storing read data ：Number of data to be read at a time
Ranges of
operands
(For DVP-EH2
models only)
：0 ~ 7 ：0 ~ 255
：1 ~ (255 - ) / 2 when is odd number.
1 ~ (256 - ) / 2 when is even number
Program
example
Read CR#103 of special module No.0 into D20 and CR#104 into D21. Only 1 datum
is read at a time (n = 1).
DFR OM K0 K103 D20 K1
X0
API
79
DTO
P
Write CR Data into Special Modules
Operands
：No. of special module ：CR# in special module to be written
：Data to be written in CR ：Number of data to be written at a time
Ranges of
operands
(For DVP-EH2
models only)
：0 ~ 7 ：0 ~ 255
：1 ~ (255 - ) / 2 when is odd number.
1 ~ (256 - ) / 2 when is even number.