Toshiba Q9 Plus ASD, Installation & Operation Manual

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E6581611
F-139
6
6.38.2 Using RS485
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Communication function settings
Commands and frequency settings are given priority by communication. (Prioritized by commands from the
panel or terminal block.) Thus, command and frequency settings from communication are activated,
regardless of the command mode selection (
cmod ) or frequency settings mode selection settings ( fmod ).
However, setting 48: SCLC (switching from communication to local) with input terminal function selection and
when inputting from an external device, it is possible to operate at command mode selection (
cmod ) and
frequency setting mode selection (
fmod
) settings.
Moreover, selecting local mode with the EASY key as Local / remote key function changes to panel
frequency/panel operation mode.
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Transmission specifications
Item Specifications
Communication protocol
TOSHIBA inverter protocol
MODBUS-RTU
protocol
Interface RS485 compliant
Transmission scheme
Half duplex [Serial bus type (Line terminations resistor necessary at
both ends of system)]
Wiring 2-wire
Transmission distance 500 m max. (total length)
Connection terminals
32max. (including upper host computer) Inverters connected in the
system: 32max.
Synchronization scheme Start-stop synchronization
Communication baud rate 9600 bps to 38.4kbps
Character transmission
<ASCII mode> JIS X0201 8-bit(ASCII)
<Binary mode> Binary codes fixed to 8 bits Binary codes fixed to
8 bits
Error detecting scheme 1 Parity: Even/Odd/Non parity (selectable using a parameter)
Error detecting scheme 2 Checksum CRC
Stop bit length Received by inverter : 1bit / Sent by inverter : 2 bits
Order of bit transmission format Low-order bits transmitted first
Character transmission format 11-bit characters (Stop bit =1 , with parity)
Inverter Number
<ASCII mode> 0-99
<Binary mode> 0-63 (3Fh)
1-247
Broadcast communication
Inverter Number should be set to
<ASCII mode> ** (*? or ?* (?=0-9) is available)
<Binary mode> 255 (0FFh)
Inverter Number
should be set to 0
Frame length Variable
Error correction None
Response monitoring None
Other
Inverter operation at communication time-over: Select from
trip/alarm/none
¤
When alarm is selected, an alarm is output from the output terminal.
When trip is selected, err5 blinks on the panel.