2 Functions of Devices in DVP-PLC
DVP-PLC Application Manual
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7. Note:
a) EASY EASY PLC LINK is based on MODBUS communication protocol.
b) EH/EH2/SV supports 32 stations in the LINK and reading/writing of more than 16 data (SET1353) (M1353 =
On). SA/SX/SC supports 16 devices in the LINK and reading/writing of 16 data.
c) EH/EH2/SV: When a MASTER PLC and a Slave PLC is connected, they are able to read/write maximum
100 WORD data (M1353 = On). SA/SX/SC: Does not support M1353. When a Master PLC and a Slave PLC
is connected, they are able to read/write maximum 16 WORD data.
d) When the Master PLC is connected through COM2 (RS-485), baud rates and communication formats of all
Slave PLCs must be the same (set in D1120). When SA/SX/SC/EH/EH2/SV serves as Master, it supports
ASCII and RTU format.
e) When the Slave PLC is connected through COM2 (RS-232/RS-485/RS-422), baud rates and
communication formats of all connected Slave PLCs must be the same as those in the Master PLC (set in
D1120). When SA/SX/SC/EH/EH2/SV serves as Slave, it supports ASCII and RTU format.
f) When the Slave PLC is connected through COM1 (RS-232), baud rates and communication formats of all
connected Slave PLCs must be the same as those in the Master PLC (set in D1036). When
SA/SX/SC/EH/EH2/SV serves as Slave, it supports ASCII and RTU format.
g) When the Slave PLC is connected through COM3 (RS-232/RS-485), baud rates and communication
formats of all connected Slave PLCs must be the same as those in the Master PLC (set in D1109). When
SA/SX/SC/EH/EH2/SV serves as Slave, it only supports ASCII format (Max. baud rate = 38,400bps).
h) The start station No. (K1 ~ K214) of Slave ID1 is assigned by D1399 of Master PLC. Station No. of every
Slave and Master PLC can not be the same (set in D1121).
i) For one-to-one LINK: Connected through RS-232, RS-485, RS-422. PLC COM1, COM2, COM3 support
many communication formats.
j) For one-to-many LINK: Connected through RS-485. PLC COM1, COM2, COM3 support many
communication formats.
8.
How to operate EASY EASY PLC LINK:
a) Set up the baud rates and communication formats of Master PLC and all connected Slave PLCs and make
them the same. COM1_RS-232: D1136; COM2_RS-232/RS-485/RS-422: D1120; COM3_RS-232/RS-485:
D1109.
b) Set up the station No. of Master PLC (in D1121) and assign the start station No. of Slave PLC from D1399
of Master PLC. Next, set up the station No. of Slave PLC. Station No. of Master and Slave cannot be the
same.
c) Set up the number of connected Slave stations and the number of data to be read in/written to Slave
stations. For EH/EH2/SV (M1353 = On): Enable the function of the 32 conncected Slaves and
reading/writing of more than 16 data (Max. 100 data). Next, set up the No. of D registers for storing the read
data (D1480 ~ D1495, D1576 ~ D1591) and written data (D1496 ~ D1511, D1592 ~ D1607) (See the
explanations above on special D). SA/SX/SC only supports reading/writing of 16 data.
d) Set up the length of data to be read from/written into the Slave. (If the user does not set up set them up, PLC
will follow the initial setting or the setting set in the previous operation.) (See the explanations above on
special D.)
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