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PROFIBUS DP Slave Communication Module DVPPF02-H2
DVP-PLC Application Manual
7
3.3 Transmission Distance & Baud Rate
The communication speed in PROFIBUS DP ranges from 9.6k bps to 12M bps, and the length of
transmission cable varies upon the transmission speed. The transmission distance ranges from 100m to 1,200m.
See the table below for the baud rates DVPPF02-H2 supports and their corresponding transmission speed.
Baud rate (bps) 9.6k 19.2k 93.75k 187.5k 500k 1.5M 3M 6M 12M
Distance (m) 1,200 1,200 1,200 1,000 400 200 100 100 100
4 Control Registers
4.1 Definitions
The control registers (CR) are the registers inside DVPPF02-H2. See the table below for the definitions of
all the CRs. DVP-EH2 series PLC MPU can read or write the CR allowed through DFROM/DTO instructions.
CR# Attribute Content High byte Low byte
#0 Read Model name DVPPF02-H2 model code = H’0250
#1 Read Firmware version
Displaying the current firmware version in hex, e.g.
V1.00 is indicated as H’0100.
#2 Read Length of I/O data Length of output I/O data Length of input I/O data
#3 ~ #102 Read/write
Input data
mapping
Area for storing data from DVPPF02-H2 to PROFIBUS
DP master
#103 ~ #202 Read
Output data
mapping
Area for storing data from PROFIBUS DP master to
DVPPF02-H2
#203 ~ #206 Set up by the system. DO NOT use it.
#207 ~ #250 Reserved
#251 Read Error code
Registers for storing errors. See the error code table in
21.6 for more details.
#252 ~ #383 Reserved
#384 ~ #511 Set up by the system. DO NOT use it.
4.2 Data Transmission between DVPPF02-H2 & PROFIBUS DP Master
Once a PROFIBUS DP network is established, the data written into the data mapping area in PROFIBUS
DP will be transmitted automatically to the registers starting from CR#103 in DVPPF02-H2 through PROFIBUS
DP bus. The length of data transmitted is decided by the parameter setting, Max. 100 words at a time. The data
in the registers starting from CR#3 in DVPPF02-H2 will be transmitted automatically to the data mapping area
in PROFIBUS DP master through PROFIBUS DP bus. The length of data transmitted is decided by the
parameter setting, Max. 100 words at a time as well. See the table below for the data transmission between
DVPPF02-H2 and PROFIBUS DP master.
Registers in
DVP-EH2 PLC
MPU
DFROM/DTO operation
Registers in
DVPPF02-H2
Data
transmission on
PROFIBUS DP
Data mapping area
in PROFIBUS DP
master
DVP-EH2 reads
CR in
DVPPF02-H2.
DFROM (read)
CR#103 ~ #202
Output mapping
area in PROFIBUS
DP master
DVP-EH2 writes
CR in
DVPPF02-H2.
DTO (write)
CR#3 ~ #102
Input mapping area
in PROFIBUS DP
master