Filter
Top Products
PROFIBUS DP Slave Communication Module DVPPF02-H2
DVP-PLC Application Manual
24
Slot
External I/O word
for S7-300
Data transmission direction
in PROFIBUS DP network
Register in
DVPPF02-H2
PIW256 CR#3
2
PIW258 CR#4
PIW260 CR#5
PIW262 CR#6
PIW264 CR#7
3
PIW266
CR#8
About data mapping:
The I Address of the master (starting from the first address of slot 0 ~ slot 4) corresponds to CR from CR#3
of the slave. The Q Address (starting from the first address of slot 0 ~ slot 4) corresponds to CR from
CR#103. The I/Q Address in every slot increases by 2, in which the I Address is indicated as PIW and Q
Address as PQW. The CR corresponds to PIW and PQW increases by 1. According to the table above, the
data in PQW256 ~ PQW270 are transmitted automatically to CR#103 ~ CR#110, and the data in CR#3 ~
CR#8 are transmitted automatically to PIW256 ~ PIW266 through PROFIBUS DP bus. The above mapping
relation will be formed automatically after the parameter is configured.
¡ Program example
Program of slave
DFROM K0
K0
DTO
K103
K3
D10
D20
M1000
M0
K3
K4
z When DVP-EH2 PLC MPU is running and M1000 is On, DVP-EH2 will move the 8 words of data
transmitted from PROFIBUS DP master to CR#103 ~ CR#110 to D10 ~ D17 through PROFIBUS
DP bus. When M0 = On, DVP-EH2 will write the contents in D20 ~ D25 into CR#3 ~ CR#8.
DVPPF02-H2 will transmit these data to PROFIBUS DP master through PROFIBUS DP bus.
z PROFIBUS DP bus completes the data transmission between the master and DVPPF02-H2.
DFROM/DTO instruction however completes the reading/writing of CR data in DVPPF02-H2 by
DVP-EH2.
z Make sure you use DFROM/DTO instruction instead of FROM/TO instruction to deal with the CR
data in DVPPF02-H2 by DVP-EH2.
See the table below for the data transmission information:
Slot
External I/O word
for S7-300
Data transmission
direction in
PROFIBUS DP
network
Register in
DVPPF02-H2
DFROM/DTO
operation
Register in
DVP-EH2
PQW256 CR#103 D10
0
PQW258 CR#104 D11
PQW260 CR#105 D12
1
PQW262 CR#106 D13
3 PQW264
CR#107
DFROM (read)
D14