Communication State Model Management - Mitsubishi Electric MELSEC iQ-R Series User Manual

8.4

Communication State Model Management

Series
MELSEC-Q series
MELSEC iQ-R series
Communication link state between host and SECS- level is managed using the following state model.
Communication between the device and the host is established once the state becomes COMMUNICATING (communication
in progress).
The communication state model is completely managed by the SECS/GEM communication software.
Using the communication state settings, configure the device assignment, default values of the communication state, etc. to
notify the programmable controller CPU about the current communication state.
COMMUNICATIONS
(1)
ENABLED
(4)
NOT COMMUNICATING
(HOST-INITIATED
WAIT CR
FROM HOST
(10)
No. Current state
(1) (Enter
COMMUNICATIONS
state)
(2) DISABLED
(Communication
disabled)
(3) ENABLED
(Communication
enabled)
(4) (Enter to communication
ENABLED)
(5) (Enter equipment
initiated connect)
(6) WAIT CRA
(Awaiting
communication
establishment request
confirmation)
(7) WAIT DELAY
(Awaiting delay timer
timeout)
8 GEM COMPLIANT FUNCTIONS
180
8.4 Communication State Model Management
SECS/GEM communication software
Non-GEM version


DISABLED
(2) (3)
(EQUIPMENT-INITIATED
(5)
WAIT CRA
(7)
(8)
(6)
WAIT
(12)
COMMUNICATING
(11)
Trigger New state
System initialization System default state
Operator switches from ENABLED
communication disabled (Communication enabled)
to enabled
Operator switches from DISABLED
communication enabled (Communication disabled)
to disabled
Communication enabled NOT COMMUNICATING
state is activated. (Communication interrupted)
(Entered WAIT CRA
NOTCOMMUNICATING (Awaiting communication
state) establishment request
confirmation)
WAIT DELAY
S1F13 transaction
*1
failure (Awaiting delay timer
timeout)
Communication delay WAIT CRA
timer is timed out (Awaiting communication
establishment request
confirmation)
GEM version


(9)
Operation
Disabled
Disabled
Disabled
Disabled
Communication initialization
Communication delay timer is
set for timeout
S1F13 is sent
Communication delay timer is
initialized
All messages awaiting
transmission are removed
from the queue
S1F13 is sent
GEM advanced version


Comments
System default state can be
either Communication
DISABLED or ENABLED
state
SECS- communication is
enabled
SECS- communication is
disabled
Communication enabled
state is activated during
system initialization, or
alternately it can be switched
into by operator
Communication
establishment is started
through equipment initiated
connect
Timeout is awaited
*2
S1F14 is awaited (In some
cases S1F13 may be
received from the host)