Delta DVP-15MC Series, Operation Manual

Page: 322 / 972

Chapter 8 Logic Instructions
8-235
8_
8.14.3.1 RS485_Link_Manage
FB/FC
Explanation Applicable model
FB
RS485_Link_Manage is used for switching on or off RS485
communication. DVP15MC11T
DVP15MC11T-06
RS485_Link_Manage
Enable Valid
R S485_Link_M anage_instance
Open LinkOpened

Input Parameters
Parameter name Function Data type
Valid range
(Default)
Validation
timing
Enable
The instruction is executed when
Enable changes from FALSE to
TRUE.
BOOL
TRUE or FALSE
（
FALSE
）
-
Open
The 485 communication is
switched on or off.
BOOL
TRUE or FALSE
（
FALSE
）
When
Enable
changes
from FALSE
to TRUE

Output Parameters
Parameter name Function Data type Valid range
Valid
TRUE when the outputs of the instruction are valid. BOOL
TRUE / FALSE
LinkOpened TRUE when 485 communication is enabled. BOOL TRUE / FALSE

Output Update Timing
Parameter Name Timing for changing to TRUE Timing for changing to FALSE
Valid

When Enable changes to TRUE.

When Enable changes from
TRUE to FALSE.
LinkOpened

When Enable changes to TRUE, Open
changes to TRUE.

When Enable changes from
TRUE to FALSE.

When Open changes from TRUE
to FALSE.

Output Update Timing Chart
Enable
O pen
Va lid
L ink Op ened
Cas e1 Cas e3 Cas e2
Case 1
：
When Enable changes from FALSE to TRUE, Open changes to FALSE, Valid changes to
TRUE and LinkOpened changes to FALSE.
Case 2
：
As Enable changes from FALSE to TRUE, Valid changes to TRUE. In this case, LinkOpened