Mitsubishi Electric MELIPM Series Instruction Manual page 66

(1) Communication specifications
Conforming standard
Number of units connected 1 : N (max. 32 units)
Communication speed
Control protocol
Communication method
Character system
Stop bit length
Terminator
Parity check
Sumcheck
Waiting time setting
(2) Communication operation functions
Setting a value other than 0 in Pr. 122 enables RS-485 communication with the
computer connected to the PU connector, allowing you to make operation and
parameter settings.
Setting Item
Give a forward rotation operation, reverse rotation operation or stop
Start
command.
Speed setting Set the running speed.
You can read the motor speed, motor current, output voltage, drive
Monitor unit fault, or control circuit output terminal assignment function
activated.
Used to reset the drive unit. A reset from the terminal RES is also
Reset
valid. Reset operation is performed as set in Pr. 188 [Section 8.4].
Parameter write You can change or read each parameter value.
and read Parameter write is performed as set in Pr. 77 [Section 8.1].
Select the operation mode through serial communication.
Operation Mode
Mode
Communication
operation mode Write
Read
Mode
External
operation mode Write
Read
The following operation is performed when a communication operation fault
occurs.
Location of Fault
Occurrence
Drive unit
Communication
(Computer or
communication
cable)
RS-485 Standard conformance
Selected between 19200, 9600 and 4800bps
Asynchronous
Half-duplex
ASCII (7 bits/8 bits) selectable
Selectable between 1 bit and 2 bits.
CR/LF presence/absence selectable
Selectable between presence (even/odd) and absence
Presence
Selectable between presence and absence
Instruction
Code
HFB
H7B
Instruction
Code
HFB
H7B
Communication operation
mode
Motor operation stopped
Communication continued
Whether motor operation is
stopped or continued depends on
the Pr. 75 [Section 8.2] setting.
Communication stopped
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8 PARAMETER FUNCTIONS
Description
Data
Start, speed setting and other
operation settings are made through
H0002
serial communication.
H0002
Data
Start and speed setting are made
using the input signals from the
H0001
control circuit terminals.
H0001
Operation
External operation mode
Motor operation stopped
Communication continued
Motor operation continued
Communication stopped
8-12
Description