Western Reserve Controls, Inc.
1782-JDO User’s Manual
PRELIMINARY
9
value is calculated by the JDO using the number of B1 devices you define in Parameter 4
and can be read from Parameter 5 in the Parameter Object and the EDS file. The default
value should be 4.
2. Map the data from your IO response to your scanners memory map.
i. The first byte indicates the status byte from the B1.
ii. The second byte contains the DI’s for channels 0-7.
iii. The third byte contains the DI’s for channels 8-15.
3. Direct the master to begin polling the JDO. The JDO will continuously issue Read Status
commands to the B1 and update the DeviceNet Poll Response (input data) with the input
data from the B1.
Table 2-1
JDO Input Data Format (10 B1’s)
BYTE
B1 #
MEANING
Byte 0
1
st
data byte, DI’s 0-7
Byte 1
1
st
data byte, DI’s 8-15
Byte 2
2
nd
data byte, DI’s 0-7
Byte 3
2
nd
data byte, DI’s 8-15
Byte 4
3
rd
data byte, DI’s 0-7
Byte 5
3
rd
data byte, DI’s 8-15
….
Byte 18
10
th
data byte, DI’s 0-7
Byte 19
10
th
data byte, DI’s 8-15
Byte 20
1
st
status byte
Byte 21
2
nd
status byte
Byte 25
3
rd
status byte
….
Byte 29
10
th
status byte