3 detailed relay control i/o map, Base address +0 – Measurement Computing CIO-RELAY08 User Manual
Page 10
Table 4-2. Sample Coding to Turn ON Relays 0, 1, 3, 5, & 7
1
1
1
1
1
1
OP0
2
1
2
2
1
2
OP1
0
0
4
0
0
4
OP2
8
1
8
8
1
8
OP3
0
0
16
0
0
10
OP4
32
1
32
20
1
20
0P5
0
0
64
0
0
40
OP6
128
1
128
80
1
80
OP7
WEIGHT
ON=1
DECIMAL
WEIGHT
ON=1
HEX
RELAY
Totals
AB
171
4.2 PROGRAMMING NOTES
WRITE = CONTROL: Write a byte to the register to control the relays. A one in the
relay bit position turns the relay on.
READ = STATUS: Read the status of the relay control register. A one in the relay
bit position indicates the relay is on.
ON & OFF for FORM C RELAYS:
ON means that FORM C relay common terminal is in contact with the No rmally
Open contact.
OFF means that FORM C relay common terminal is in contact with the no rmally
closed contact.
4.3 DETAILED RELAY CONTROL I/O MAP
The following section provides a detailed description of the register map and relay
control registers.
Base Address +0
(applicable to all CIO-RELAY series boards).
RELAY OP7 OP6 OP5 OP4 OP3 OP2 OP1 OP0
BIT No. 7 6 5 4 3 2 1 0
HEX Value 80 40 20 10 8 4 2 1
DECIMAL 128 64 32 16 8 4 2 1
6