Eaton ELC-PB - Page 119

ELC Programming Manual
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2-90
It can only be used as slave and supports ASCII/RTU communication format, baud rate(115200bps
max), and modify the length of data bit, including Data bits, Parity bits and Stop bits.
COM2:
It can be used as master or slave and supports ASCII/RTU communication format, baud rate
(115200bps max), and modify the length of data bit, including Data bits, Parity bits and Stop bits.
Format setting:
Port
Item
COM1 COM2
Communication format D1036 D1120
Communication setting holding M1138 M1120
ASCII/RTU mode M1139 M1143
D1036:
RS-232 communication protocol of slave ELC. (b8-b15 is not used)
D1120:
RS-485 communication protocol of master/slave ELC. Refer table below for setting:
Content
b0 Data Length 0: 7 data bits, 1: 8 data bits
00: None
01: Odd
b1
b2
Parity bit
11: Even
b3 Stop bits 0: 1 bit, 1: 2bits
0001(H1): 110
0010(H2): 150
0011(H3): 300
0100(H4): 600
0101(H5): 1200
0110(H6): 2400
0111(H7): 4800
1000(H8): 9600
1001(H9): 19200
1010(HA): 38400
1011(HB): 57600
b4
b5
b6
b7
Baud rate
1100(HC): 115200
b8 Start word selection None D1124
b9 First end word selection None D1125
b10 Second end word selection None D1126
b11~b15 No definition
Example 1: modification method for COM2 communication format
1. When modifying COM2 communication format, it needs to add program code below in the
front of program. When the ELC switches from STOP to RUN, it will detect if M1120 is ON at
ELC first scan time. If M1120 is ON, it will change COM2 setting by D1120.