4 Remote I/O Master Communications
4-8
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
z
Fixed Allocations for Remote I/O
4-1-4
Procedure for Using Remote I/O Master
Turn ON the communications, slave, and Controller power supplies.
Switch the CPU Unit to PROGRAM mode.
Master remote I/O communications will begin with the scan list enabled.
(Use the software switches to start or stop communications.)
Change
*_Sw1MstrEnblCmd
(Master Enable Switch) to TRUE. (The master will remain enabled even if the power is turned OFF and back ON again.)
Check to see if both the MS and NS indicators are lit green on the Master Unit and all slaves.
Define user-defined variables in the area to which I/O data is allocated.
Switch the CPU Unit to RUN mode.
Perform the following steps to
start with the scan list disabled.
*3
1) Change
*_Sw1MstrFixAloc1Cmd
to
*_Sw1MstrFixAloc3Cmd
(Master
Fixed Allocation Setting 1 to 3
Switch) to TRUE.
2) Monitor and check the Registered
Slave Table (
*_RegSlavTblSta,
*_RegSalvTblNbSta[0] to [63]
) to
see if communications are possible
with registered slaves.
3) Change
*_Sw1SListEnblCmd
(Scan
List Enable Switch) to TRUE.
Perform the following steps to
re-register the scan list when starting
with the scan list enabled.
*3
Perform the following steps to make no changes
to the fixed allocations area and scan
list when starting with the scan list enabled.
*3
*1 Turn ON the communications power supply prior to
turning ON the slave power supply or the slaves may
not go online.
1) Change
*_Sw1SListClrCmd
(Scan List Clear Switch) to TRUE.
2) Change
*_Sw1MstrFixAloc1Cmd
to
*_Sw1MstrFixAloc3Cmd
(Master Fixed Allocation Setting
1 to 3 Switch) to TRUE.
3) Monitor and check the Registered
Slave Table (
*_RegSlavTblSta,
*_RegSalvTblNbSta[0] to [63]
) to
see if communications are possible
with registered slaves.
4) Change
*_Sw1SListEnblCmd
(Scan
List Enable Switch) to TRUE.
Pre operations
Master function
enabled
Post operation
Area Allocations and
Scan List Creation
*2 Execute this only when master communications are disabled.
(If the Master Enable Switch is turned ON 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.)
*3 The mode can be confirmed from the dots on the
7-segment indicator on the Master Unit.
Left dot not lit: Scan list enabled
Left dot flashing: Scan list disabled
Summary of Contents for CJ1W-DRM21
Page 12: ...Manual Structure 10 CJ series DeviceNet Units Operation Manual for NJ series CPU Unit W497 ...
Page 42: ...Revision History 40 CJ series DeviceNet Units Operation Manual for NJ series CPU Unit W497 ...
Page 345: ...Index 1 CJ series DeviceNet Units Operation Manual for NJ series CPU Unit W497 I Index ...
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