Omron NX102-10 Series, Руководство пользователя

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Enumerator Meaning
⋮ ⋮
_EM18 24 bank area of Expansion Memory Area
The data type of Option is structure_sRESPONSE. The specifications are shown below.
Variable Name Contents Data type Valid range Unit
Initial
value
Option Response
Response monitoring
and retry specifications _sRES-
PONSE
--- --- ---
isNonResp No response
TRUE: Response is not
required.
FALSE: Response is re-
quired.
BOOL
Depends on
data type.
--- FALSE
TimeOut Timeout Time
Timeout time
0: 2.0 s
UINT 0.1 s
20
(2.0 s)
Retry Retry count Retry count USINT 0 to 15
Cou
nt
0
If no response is returned within the timeout time Option.TimeOut when the value of the Response Not
Necessary Flag Option.isNonResp is FALSE, the command is retried until the response is returned.
The retry count is specified by Option.Retry .
The timeout time is Option.TimeOut x 0.1 s. However, when the value of Option.TimeOut is 0, the
timeout time becomes 2.0 s. The initial value of Option.TimeOut is also 2.0 s.
Related System-defined Variables
Name Meaning
Data
type
Description
_Port_numUsingPort
Number of Used
Ports
USINT This is the number of ports that are currently used.
_Port_isAvailable
Network Communi-
cations Instruction
Enabled Flag
BOOL
TRUE: A port is available.
FALSE: A port is not available.
Precautions for Correct Use
• This instruction can be executed only when there is an available port. Therefore, use the system-
defined variable _Port_isAvailable (Network Communications Instruction Enabled Flag) in an N.O.
execution condition for the instruction.
• The command is not sent if the value of RcvSize is 0 . When the instruction is executed, the value of
Done changes to TRUE.
• During execution of this instruction, set Option.Retry to a value other than 0 by considering the case
when the send message or response is lost due to noise that occurs during communication. If no
response is returned within
Option.TimeOut , it is recommended to retry the process.
• When this instruction is written in the ST program, make sure that the instruction is executed for
each task period during execution of this instruction. If this instruction is not executed every task pe-
riod, the normal process may not be performed.
• This instruction cannot be used on the event task. An error occurs during compiling.
• An error occurs in the following cases.
Error will change to TRUE.
3 Client Function
3 - 10
NX-series CPU Unit FINS Function User's Manual (W596)