Toshiba TOSVERT VF-S15 series User Manual

E6581913
74
Appendix 4 Troubleshooting
If a problem arises, diagnose it in accordance with the following table before making a service call.
If the problem cannot be solved by any remedy described in the table or if no remedy to the problem
is specified in the table, contact your Toshiba distributer.
Problem Remedies Reference
Communication will not take
place.
- Are both the computer and the inverter turned on?
- Are all cables connected correctly and securely?
The state of transmission and reception can be checked in the state
of communication of the status monitor function of inverter.
For details, please see inverter’s instruction manual.
- Are the same baud rate, parity and bit length set for every unit on the
network?
- Is the line of network equipped with a terminator/bias resistance?
Inverter’s
instruction
manual
Section 7.1
Appendix 5
An error code is returned.
- Is the data transmission format correct?
- Does the data written fall within the specified range?
- Some parameters cannot be written during inverter operation.
Changing should be attempted when the inverter is in halt.
-
f700 (Parameter protection selection) is 2: Writing prohibited
(1+RS485 communication),
4: Reading prohibited (3+RS485 com
munication)
- If
f738 (Password setting) was set to data, f738 can not set to
data.
Section 4.1
Section 5.1
Chapter 9
Inverter’s
instruction
manual
The trip err5 and alarm t
occur.
- Check the cable connection and the timer setting. Section 7.3
Frequency instructions from the
computer have no effect.
- Is the frequency setting mode selection parameter set to “computer”?
Commands, including the run
and stop commands, from the
commuter have no effect.
- Is the command mode selection parameter set to “computer”?
Section 8.1
In
verter’s
instruction
manual
A change to a parameter does
not take effect.
Some communication-related parameters do not take effect until the
inverter is reset. To make them take effect, turn the inverter off tempo-
rarily, and then turn it back on.
Chapter 7
The setting of a parameter was
changed, but it returns to its
original setting when the inverter
is turned off.
When using the Toshiba inverter protocol, use the W command to write
data into the EEPROM. If you use the P command that writes data into
the RAMs only, the data will be cleared when the inverters are reset.
Section 4.2
The setting of a parameter was
changed, but the function doesn’t
work.
- Some parameters become effective after the drive is reset.
- The Modbus RTU protocol has usage restrictions.
Chapter 7
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Toshiba TOSVERT VF-S15 series Specifications

General

Brand	Toshiba
Model	TOSVERT VF-S15 series
Category	Inverter
Language	English