Ny-Series Instructions Reference Manual (W560 - Omron NY532-5400 Reference Manual

Related System-defined Variables
Name
_EC_MBXSlavTbl[i] Message Communica-
tions Enabled Slave Table
"i" is the node address.
_NXB_UnitMsgActiveTbl _NXB_UnitMsgActiveTbl
[i] [i]
Precautions for Correct Use
• Execution of this instruction is continued until processing is completed even if the value of Execute
changes to FALSE or the execution time exceeds the task period. The value of Done changes to
TRUE when processing is completed. Use this to confirm normal completion of processing.
• Refer to Using this Section (page 2-3) for a timing chart for Execute, Done, Busy, and Error.
• If WriteDat is an array, make sure that the overall size of the array is the same as the size of the NX
object to write in the specified Unit.
• For UnitProxy, specify the device variable that is assigned to the EtherCAT Coupler Unit, an NX Unit
on the EtherCAT Coupler Unit, or an NX Unit connected to the NX bus of the CPU Unit in the I/O Map
of the Sysmac Studio. Refer to the Sysmac Studio Version 1 Operation Manual (Cat. No. W504-E1-
07 or later) for details on assigning device variables.
• Always use a variable for the parameter to pass to WriteDat. A building error will occur if a constant is
passed.
• To write and save data with a Power OFF Retain attribute, execute the NX_SaveParam instruction
(page 2-848) after you execute the NX_WriteObj instruction. If you restart the Unit before you exe-
cute the NX_SaveParam instruction, the previous NX object data is restored.
• This instruction is related to NX Message Communications Errors. If too many instructions that are
related to NX Message Communications Errors are executed at the same time, an NX Message
Communications Error will occur. Refer to Instructions Related to NX Message Communications
Errors (page A-20) for a list of the instructions that are related to NX Message Communications
Errors.

NY-series Instructions Reference Manual (W560)

Meaning Data type
BOOL
BOOL
2 Instruction Descriptions
Description
This variable indicates whether communications are
possible for each slave.
TRUE: Communications are possible.
FALSE: Communications are not possible.
This table indicates the slaves that can perform
message communications.
Use this variable to confirm that communications
with the relevant slave are possible.
2
2-949