Hitachi SJ7002 Series Instruction Manual page 295

Command – 04
The 04 command reads the status of the inverter.
The frame format of command 04 follows the
diagrams and specification tables. The transmit
frame has no data field.
STX
Node
Command
BCC
[CR]
The receive frame has an 8-byte data field,
containing values for three trip items (plus a
reserved field).
STX
Node
Data
BCC
[CR]
Trip data is organized as shown. The
table below lists the codes and their
meanings.
Element Description
Control code (STart of TeXt)
Node (station) address of inverter
Transmission command
Block check sum code
Control code (carriage return)
Element Description
Control code (STart of TeXt)
Node (station) address of inverter
Transmission data
Block check sum code
Control code (carriage return)
Code Status A Definition
00 Initial status
01 —
02 On Stopping
03 On running
04 On free-run stop
05 On jog
06 On dynamic braking
07 On retry
08 On trip
09 On under-voltage
10 —
Transmit frame format
STX Node Command
Size
1 byte STX (0x02)
2 bytes 01 to 32
2 bytes 04
2 bytes Exclusive OR of Node,
Command, and Data
1 byte [CR] (0x0D)
Receive frame format
STX Node
Size
1 byte STX (0x02)
2 bytes 01 to 32
8 bytes (see next table)
2 bytes Exclusive OR of Node,
Command, and Data
1 byte [CR] (0x0D)
Data field contents
Status A Status B
Status B Definition
On stopping
On running Stop
On tripping Deceleration speed
— Constant speed
— Acceleration speed
— Forward
— Reverse
— Reverse from forward
— Forward from reverse
— Forward start
— Reverse start
B–11
SJ700 Inverter
2
BCC [CR]
Value
Data BCC [CR]
Value
Status C (reserved)
Status C Definition
—