Hitachi WJ200-001S Instruction Manual page 281

Wj200 series single/three-phase inputs 200v/400v class
Hide thumbs Also See for WJ200-001S:
Table of Contents

Advertisement

474
Communication signal Disconnect Detect
This signal function is enabled only when ModBus-RTU has been selected for the
communication. If a reception timeout occurs, the inverter continues to output the
communication line disconnection signal until it receives the next data.
Specify the limit time for reception timeout by setting the communication trip time
().
External control equipment
Monitoring timer
Communication line
disconnection signal (NDc)
Option
Terminal
Code
Symbol

NDc
Valid for inputs:
Required settings
Notes:
 The example circuit for terminal [11] drives a relay
coil. Note the use of a diode to prevent the
negative-going turn-off spike generated by the coil
from damaging the inverter's output transistor.
Function Name
State
Communication
signal disconnect
detection
11, 12, AL0 – AL2

ON
When there is a disconnection in communiciation
OFF
When there is no disconnection in communiciation
Example for terminal [11] (default output
configuration shown – see
Inverter output
terminal circuit
Example for terminal [AL0], [AL1], [AL2] (requires
output configuration – see
Inverter logic
circuit board
AL0
Power
supply
See I/O specs on
Communication

trip time
Description
page
3-89):
NDc
CM2
11
RY
page 4-51 and
3-91):
NDc
AL1
AL2
Load
page 4-6

Advertisement

Table of Contents

Troubleshooting

loading

Table of Contents