Mitsubishi Electric MELSEC iQ-R02CPU - Page 386

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APPX
Appendix 5 TCP/IP Communications, UDP/IP Communications
■When "Open by Program" is set
Before the open/close request is received from the external device, the Ethernet-equipped module must execute the OPEN/
CLOSE instruction and enter the open/close standby state. Data can be sent and received after the open processing
completes normally.
For OPEN/CLOSE instruction, refer to the following.
 MELSEC iQ-R Programming Manual (Module Dedicated Instructions)
Ex.
Open/close processing for connection No.1
 After the module parameters are set, checks that the initial processing for the Ethernet-equipped module has completed normally. ('Initial status'
(Un\G1900024.0): On)
 Start the open processing using the OPEN instruction. ('Open request signal (connection No.1)' (Un\G1900008.0): On)
 The Ethernet-equipped module executes the open processing. (only internal processing)
 Data can be exchanged after the open processing completes normally.
 Start the close processing using the CLOSE instruction. ('Open request signal (connection No.1)' (Un\G1900008.0): Off)
 The Ethernet-equipped module executes the close processing. (only internal processing)
 Data communication ends when close processing completes normally.
Ò
Ó
Ö
ÔÕ ×Ø
Open status
Open enable status (closed)
Closed status
'Initial status'
(Un\G1900024.0)
OPEN instruction
OPEN instruction
completion device
OPEN instruction
completion device +1
CLOSE instruction
CLOSE instruction
completion device
CLOSE instruction
completion device +1
'Open completion signal
(connection No.1)'
(Un\G1900000.0)
Internal processing Internal processing
1 scan
1 scan
Power-on
Parameter
communications
completed
Abnormally ended
Abnormally
ended