Omron CJ1W-DRM21, Operation Manual

Page: 155 / 350

4-15
4 Remote I/O Master Communications
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
4-3 Fix
e
d A
llocation
s
4
4-3-2 Allo
cation Procedures
z
Step 1: Place the CPU Unit in PROGRAM mode.
z
Step 2: Change the Master Enable Switch to TRUE
If the master communications have been disabled (if *_MstrEnblSta (Master Function Enabled Sta-
tus) is set to FALSE), change *_Sw1MstrEnblCmd (Master Enable Switch) to TRUE to enable mas-
ter communications. Once Master communications have been enabled by changing this switch to
TRUE, it will not change even if the power is turned OFF and back ON again.
Note If the master communications are enabled (if *_MstrEnblSta (Master Function Enabled Sta-
tus) is TRUE), skip this step and go onto the next step. (If the Master Enable Switch is
changed to TRUE (when master communications are enabled), a Unit error will occur and a
C2 error will be displayed on the 7-segment indicator on the front panel.)
z
Step 3: Change the Scan List Clear Switch to TRUE
If the Unit is in the Scan List Enable mode (if *_SListDsblSta (Scan List Disable Status) is set to
FALSE), change *_Sw1SListClrCmd (Scan List Clear Switch) to TRUE to change to the Scan List
Disabled mode.
Note If the Unit is already in the Scan List Disabled mode (if *_SListDsblSta (Scan List Disable
Status) is TRUE), skip this step and go onto the next step. (If the Scan List Clear Switch is
changed to TRUE (when the Unit is in the Scan List Disabled mode), a Unit error will occur
and a C2 error will be displayed on the 7-segment indicator on the front panel.)
z
Step 4: Select Fixed Allocations Area 1 to 3
Change *_Sw1MstrFixAloc1Cmd to *_Sw1MstrFixAloc3Cmd (Master Fixed Allocation Setting 1 to 3
Switch) to TRUE to select the fixed allocations area from 1 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 CIO Area in the memory used for CJ-series Unit.
z
Step 5: Change the Scan List Enable Switch to TRUE
Remote I/O communications will start with the scan list disabled after you select a fixed allocations
area. Check to see if communication is proceeding normally with each slave, and then change
*_Sw1SListEnblCmd (Scan List Enable Switch) to TRUE to communicate with the scan list enabled.
4-3-2 Allocation Procedures
Name of device
variables for
CJ-series Unit
Name Fixed allocations
area number
Allocated
OUT area Allocated
IN area
*_Sw1MstrFixAloc1C
md Master Fixed Allocation
Setting 1 Switch Fixed allocations area
1 CIO 3200 to
CIO 3263 CIO 3300 to
CIO 3363
*_Sw1MstrFixAloc2C
md Master Fixed Allocation
Setting 2 Switch Fixed allocations area
2 CIO 3400 to
CIO 3463 CIO 3500 to
CIO 3563
*_Sw1MstrFixAloc3C
md Master Fixed Allocation
Setting 3 Switch Fixed allocations area
3 CIO 3600 to
CIO 3663 CIO 3700 to
CIO 3763