Delta VFD004L11A User Manual page 59

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9 - 03 Modbus Communication Watchdog Timer
Settings
This parameter can be set during operation.
If the Watchdog timer function is enabled, the timer will start counting once the first valid
Modbus communication signal is received after power-up or reset. The timer will reset
to 0 after each valid Modbus communication message is received. If the watchdog timer
reaches the value set in Pr. 9-03, the drive will stop its output and display the message
"CE10" on the digital keypad. This fault can reset by an external terminal, keypad or a
Modbus communication reset command.
9 – 04 Communication Protocol
Settings
1.Computer Control

There is a built-in RS-485 serial interface, marked (RJ-11 Jack) on the control
terminal block, for VFD Series. The pins are defined below:
Each VFD-L AC drive has a pre-assigned communication address specified by Pr.
(9-00). The computer then controls each AC drive according to its communication
address.
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d0 Disable
d1 to d20
d 0 Modbus ASCII mode, protocol <7,N,2>
d 1 Modbus ASCII mode, protocol <7,E,1>
d 2 Modbus ASCII mode, protocol <7,O,1>
d 3 Modbus ASCII mode, protocol <8,N,2>
d 4 Modbus ASCII mode, protocol <8,E,1>
d 5 Modbus ASCII mode, protocol <8,O,1>
d 6 Modbus RTU mode, protocol <8,N,2>
d 7 Modbus RTU mode, protocol <8,E,1>
d 8 Modbus RTU mode, protocol <8,O,1>
This parameter can be set during operation.
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1 to 20 sec
1 : + E V
2 : G N D
3 : S G -
4 : S G +
1
6
5-41
VFD-L Series
Factory Setting: d 0
Unit: 1 sec
Factory Setting: d 0
5