Eaton ELC-PB, Programming Manual

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2. Prog rammi ng Con cep ts
M N050 03003E F or m ore info rm ati on vi sit: www.eaton.co m 2-133
Explanation:
1. The basic communication protocol for ELC LINK is MODBUS
2. When Slave ELC is connected through COM1 (RS-232), baud rate and communication format
of all Slaves must be the same (set in D1036). ELC supports both ASCII and RTU mode
3. When SlaveELC is connected through COM2 (RS-485), baud rate and communication format
of all Slaves must be the same (set in D1120). ELC supports both ASCII and RTU mode.
4. When Slave ELC is connected through COM3 (RS-485), baud rate and communication format
of all Slaves must be the same (set in D1109). ELC supports both ASCII and RTU mode.
5. ELC-PC/PA/PH, ELCM-PH/PA supports 16 stations in the LINK and reading/writing of 16
WORDs (max). ELC-PV supports 32 stations in the LINK and reading/writing 100 WORDs
(max) (SET1353) (M1353 = ON) from one Master ELC to one Slave ELC.
6. One to one connection can connect to RS-232 and RS-485 in series
7. One to multiple connection can connect to RS-485 in series
8. The ID number of the starting slave can be designated by D1399 and should be limited to the
range K1~K214. Slave ID cannot be repeated or the same as Master ID (set in D1121/D1255)
Operation:
1. Set up the baud rates and communication formats. Master ELC and all connected Slave
ELCs should have the same communication settings. COM1_RS-232: D1036, COM2_RS-485:
D1120, COM3_RS-485: D1109.
2. Set up Master ELC ID by D1121 and the starting slave ID by D1399. Then, set slave ID of
each slave ELC. The ID of master ELC and slave ELC cannot be the same.
3. Set up the number of connected Slave stations and the number of data to be read in/written to
Slave stations. For ELC-PV (M1353 = ON): Enable the function of the 32 connected 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). ELC-PC/PA/PH, ELCM-PH/PA
only supports reading/writing of 16 data. (If data length is not specified, ELC will take default
setting or the previous value as the set value. For details of data length registers, please refer
to the tables above)
4. Set device communication address to read/write to slave. (Refer to Special D explanation
above for special D setting. Factory setting of communication address for reading is H1064
(D100) and writing is H10C8 (D200).
5. Steps to start ELC LINK:
„
Enable the function of more than 32 stations connected to ELC LINK and reading/writing
of 16 data (Max. 100 data) (M1353).
„
Set ON M1354 to enable simultaneous data read/write in a polling of ELC LINK.