24
Remote I/O Installation and Programming Manual
4.7
Read Net Value
The Read Net Value block write command is used to read a net value from the indicator. Table 4-16 shows the
format of the command:
Table 4-16. Block Write Command 9: Read Net Value
Command Number
Specifies the Read Net Value command number, 9.
Channel Number
Specifies the channel number for the net value being read. Specify channel 1 for IQ plus 510/710 indicators.
Block read command 9 returns a 2-word net value to the PLC controller. If the block write command failed, the
command number returned in word 0 is set negative (-9). Table 4-17 shows the format of the block read
command.
Table 4-17. Block Read Command 9: Read Net Value
Word
Bit Number
Word Contents
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
1
Command Number (9)
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
Channel Number (1)
Word
Bit Number
Word Contents
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
1
Command Number (9)
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
Channel Number (1)
2
v31
Net Value
v16
Net Value (MSW)
3
v15
v00
Net Value (LSW)
DISCONTINUED
