Schweitzer Engineering Laboratories SEL-700G Series, Instruction Manual

Page: 639 / 824

E.5
Date Code 20170814 Instruction Manual SEL-700G Relay
Modbus RTU Communications
Communications Protocol
To build the response, the device calculates the number of bytes necessary to
contain the number of bits requested. If the number of bits requested is not
evenly divisible by eight, the device adds one more byte to maintain the
balance of bits, padded by zeroes to make an even byte.
In each row, the input numbers are assigned from the right-most input to the
left-most input (that is, Input 1 is TLED_06 and Input 8 is ENABLED). Input
addresses start at 0000 (for example, Input 1 is located at Input Address 0000).
Table E.7 includes the coil address in decimal and lists all possible inputs
(Relay Word bits) available in the device. Note that the command depends on
the device hardware configuration; the device responds only to installed cards.
Table E.7 02h SEL-700G Inputs (Sheet 1 of 4)
Coil Address
(Decimal) Function Code
Supported
Coil Description
a
0–7 2 Relay Element Status Row 0
8–15 2 Relay Element Status Row 1
16–23 2 Relay Element Status Row 2
24–31 2 Relay Element Status Row 3
32–39 2 Relay Element Status Row 4
40–47 2 Relay Element Status Row 5
48–55 2 Relay Element Status Row 6
56–63 2 Relay Element Status Row 7
64–71 2 Relay Element Status Row 8
72–79 2 Relay Element Status Row 9
80–87 2 Relay Element Status Row 10
88–95 2 Relay Element Status Row 11
96–103 2 Relay Element Status Row 12
104–111 2 Relay Element Status Row 13
112–119 2 Relay Element Status Row 14
120–127 2 Relay Element Status Row 15
128–135 2 Relay Element Status Row 16
136–143 2 Relay Element Status Row 17
144–151 2 Relay Element Status Row 18
152–159 2 Relay Element Status Row 19
160–167 2 Relay Element Status Row 20
168–175 2 Relay Element Status Row 21
176–183 2 Relay Element Status Row 22
184–191 2 Relay Element Status Row 23
192–199 2 Relay Element Status Row 24
200–207 2 Relay Element Status Row 25
208–215 2 Relay Element Status Row 26
216–223 2 Relay Element Status Row 27
224–231 2 Relay Element Status Row 28
232–239 2 Relay Element Status Row 29
240–247 2 Relay Element Status Row 30
248–255 2 Relay Element Status Row 31
256–263 2 Relay Element Status Row 32
264–271 2 Relay Element Status Row 33