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Fixed Allocations Section 4-3
Note More than one Master Unit can be included in a single PC with fixed alloca-
tions, as shown below (3 Units max.).
4-3-2 Procedure
Step 1: Place the CPU Unit in PROGRAM mode.
Step 2: Turn ON the
Master Enable Switch
If the master communications have been disabled (if Master Function Enable
Flag (word n+11, bit 03) is OFF), turn ON the Master Enable Switch (word n,
bit 06) to enable master communications. Once Master communications have
been enabled by turning this switch ON, it will not change even if the power is
turned OFF and back ON again.
Note If the master communications are enabled (if Master Function Enable
Flag (word n+11, bit 03) is ON), skip this step and go onto the next
step. (If the Master Enable Switch is turned ON when master com-
munications are enabled, a Unit error will occur and a C2 error will be
displayed on the 7-segment display on the front panel.)
Step 3: Turn ON the Scan
List Clear Switch
If the Unit is in the Scan List Enable mode (if Scan List Disabled Flag (word
n+11, bit 04) is OFF), turn ON the Scan List Clear Switch (word n, bit 01) to
change to the Scan List Disable mode.
Note If the Unit is already in the Scan List Disable mode (if the Scan List
Disabled Flag (word n+11, bit 04) is ON), skip this step and go onto
the next step. (If the Scan List Clear Switch is turned ON when the
Unit is in the Scan List Disable mode, a Unit error will occur and a C2
error will be displayed on the 7-segment display on the front panel.)
Step 4: Select Fixed
Allocations Area 1 to 3
Turn ON the Master Fixed Allocation Setting 1 to 3 Switch (word n, bits 08 to
10) in the Software Switches in the words allocated in the CIO Area to select
the fixed allocations area from1 to 3. One word will be allocated per node
address in order of node addresses for the output (OUT) block and one word
for the input (IN) block in the CS/CJ-series DeviceNet CIO Area.
First word n = CIO 1500 + (25 x unit number)
Step 5: Turn ON the Scan
List Enable Switch
Remote I/O communications will start with the scan list disabled after a fixed
allocations area has been selected. Check to see if communication is pro-
ceeding normally with each slave, and then turn ON the Scan List Enable
Switch (word n, bit 00) to communicate with the scan list enabled.
Master Unit
Master Unit
Slave
Slave
Software Switch
address
Software Switch name Fixed allocations
area number
Allocated
OUT area
Allocated
IN area
Word n, bit 08 Master Fixed Allocation
Setting 1 Switch
Fixed allocations area
1
CIO 3200 to
CIO 3263
CIO 3300 to
CIO 3363
Word n, bit 09 Master Fixed Allocation
Setting 2 Switch
Fixed allocations area
2
CIO 3400 to
CIO 3463
CIO 3500 to
CIO 3563
Word n, bit 10 Master Fixed Allocation
Setting 3 Switch
Fixed allocations area
3
CIO 3600 to
CIO 3663
CIO 3700 to
CIO 3763