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

2 Instruction Descriptions
Related System-defined Variables
Name
_NXB_UnitIOActiveTbl
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.
• A compiling error will occur if you use this instruction in an event task. Do not use this instruction in
event tasks.
• "CIF Unit Initialized" may occur when the NX-series Communications Interface Unit is restarted. Send
or receive the data again, if necessary.
• If you use this instruction, do not assign device variables to any I/O ports that are indicated by "W"
under the R/W column on the I/O Map Tab Page in the Sysmac Studio for the applicable NX-series
Communications Interface Unit.
• An error will occur in the following cases. Error will change to TRUE.
• A value that is out of range was set for DevicePort.DevicePortType or DevicePort.PortNo.
• The Unit, Option Board, or port specified with DevicePort does not exist.
• If more than 32 instructions from the NX_SerialSend instruction, NX_SerialRcv instruction, NX_-
ModbusRtuCmd instruction, NX_ModbusRtuRead instruction, NX_ModbusRtuWrite instruction,
NX_SerialSigCtl instruction, NX_SerialSigRead instruction, NX_SerialStatusRead instruction,
NX_SerialBufClear instruction, NX_SerialStartMon instruction and NX_SerialStopMon instruction
are executed at the same time.
• This instruction is executed with a device port variable that is the same as the one specified for
the instruction which is still being executed. In this case, the instruction which is still being exe-
cuted is one of the followings.
NX_SerialSigCtl instruction, NX_SerialSigRead instruction, NX_SerialStatusRead instruction,
NX_SerialBufClear instruction, NX_SerialStartMon instruction, and NX_SerialStopMon instruc-
tion.
• Timeout time elapsed during serial communications.
• This instruction is executed for Units other than NX-series Communications Interface Units and
Option Boards.
2-1242
Meaning
NX Unit I/O Data Active ARRAY[0..8] OF
Status BOOL
Data type
• This status tells the NX Units whether
I/O data communications can be pro-
cessed.
• The subscript of the array corre-
sponds to the NX Unit numbers. A
subscript of 0 means the NX bus
master.

NY-series Instructions Reference Manual (W560)

Description