High Speed Link Information In Gmwin - LG G3L-PUEA User Manual

CHAPTER 6 COMMUNICATION FUNCTION
After downloading the parameter, if you set 'LINK Enable' of GMWIN online menu, the
'LINK Enable' command is delivered to PLC and becomes the high speed link operation
state.
'LINK Enable' setting is available when PLC is in STOP mode. If the high speed link starts
after setting 'LINK Enable', it carries out the high speed link regardless of PLC action
mode and the 'parameter' and 'Link Enable' information shall be battery backup in PLC
CPU and the data shall be preserved even in case of power off.
Table 6.3 describes the action relation of PLC mode and high speed link.
Classification
PLC Run
PLC Stop
PLC Pause
PLC Debug

6.1.6 High speed link information in GMWIN

1) High speed link information function
As high speed link service carries out the data exchange between more than 2
communication stations, it provides the user how to verify the high speed link service status
to verify the reliability of the data got from opposite station, as high speed link information.
That is, the communication module provides the user the high speed link information every
regular time whether the high speed link is run by the user setting parameter, by collecting
the data received till that time and the high speed link information includes the whole
information of RUN-LINK (_PHSxRLINK) and LINK-TROUBLE (_PHSxLTRBL) that enables
to know the whole information of communication network, and the individual information of
_PHSxSTATE that enables to know the communication state per slave station. The user can
use the above information in the keyword format when preparing the program, and monitor
the high speed link status by using the high speed link information monitor function. When
operating several PLC by using the high speed line, it is required to verify the reliability of
the sending/receiving data by using the high speed link information such as RUN-LINK or
LINK-TROUBLE etc. before using.
A) RUN-LINK (_PHSxRLINK)
This is the whole information that describes whether the high speed link is running
normally by the user setting parameter, and a contact point that once it is 'ON', 'ON' is
maintained till the 'LINK Enable'. If the following conditions are given, 'ON' shall be
maintained :
Parameter
download
X
O
X
X
Table 6.3 The relation of PLC mode and high speed link
6-17
Link enable High speed link
setting action
X
O
X
X
Remarks
O
Run when
O high speed
link is
O
enabled.
O