Hitachi SJ Series, User Manual

Page: 471 / 786

13-8
Chapter 13 Monitor Functions
13.5 Checking the Input or Output of
Terminals
13.5.1 Checking the input of input terminals
• Want to know the status of commands currently
entered to the input terminals.
• Want to check whether input terminals are
disconnected or not.
• The input terminal monitor displays the physical ON
(H)/OFF (L) status of terminals.
• A reaction of the input terminal monitor delays
according to input terminal response time.
• The input terminal monitor is not affected by setting
of a/b contact.

Parameter
13.5.2 Checking the output of output
terminals
• Want to know the status of commands to the output
terminals which are outputting now.
• Want to check whether output terminals are
disconnected or not.
• The output terminal monitor displays the state of
internal functions.
• The output terminal monitor behaves as set for
on-delay/off-delay of output terminals.

Parameter
• If the monitor status doesn’t change when a
terminal is turned ON and OFF, the input wires may
be disconnected.
• When the [RS] terminal is turned ON, the inverter
enters a reset mode; hence the state of input
terminal cannot be checked on the input terminal
monitor. However, from the fact the inverter enters
the reset mode, you know that the terminal is
working.
(Example) The state where terminals 4 and 8 are ON.
Monitor
L L L H L L L H L L L
Terminal
No.
(B) (A) (9) (8) (7) (6) (5) (4) (3) (2) (1)
• If the output terminal status doesn’t change when
the monitor status changes, the output wires may
be disconnected.
• The output terminal monitor is not affected by
setting of a/b contact.
(Example) The state where terminals 15 and AL are
ON.
Monitor
H L H L L L L
Terminal
No.
(AL) (16) (15) (14) (13) (12) (11)
Item Parameter Data Description
Input terminal
monitor
[dA-51] LLLLLLLLLLL~HHHHHHHHHHH
Displays the ON/OFF status of
input terminals (H: ON; L: OFF).
Item Parameter Data Description
Output terminal
monitor
[dA-54] LLLLLLL~HHHHHHH
Displays the ON/OFF status of
output terminals (H: ON; L: OFF).
Q
A
Q
A
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