YASKAWA HV600 Technical Reference page 725

maintains its last commanded state. The drive will not display an alarm or fault to indicate it has lost communication.
This behavior can also be achieved by setting parameter H5-04 = 3. The drive will display an alarm and continue
running. For this specific condition, the COMM FLT ENA(POINT 90) must be enabled and CBL LOSS TMR
(POINT 91) should be set to a value other than 0. A CE drive alarm will be set.
Continue at Preset Speed
In this mode, CBL LOSS TMR (POINT 92) is set to the desired interval, CBL LOSS FRQ (POINT 91) is set to the
desired preset speed and the parameter is set to H5-04 = 4. If the time between messages exceeds the timeout interval,
the drive speed command, INPUT REF 1, (Point 60) is set to the CBL LOSS FRQ (POINT 91) and the drive
continues running at this new speed. COMM FLT ENA (POINT 90) must be set to ON.
Stop
COMM FLT ENA (POINT 90) must be set to ON. In this mode, CBL LOSS TMR (POINT 92) is set to the desired
interval and parameter H5-04 is set to a value of 0, 1, or 2. If the time between messages is longer than the timeout
interval, the speed command of the drive, INPUT REF 1, (Point 60) is set to 0. The stopping method is determined by
the setting of H5-04. A CE drive fault will be set. H5-04 = 0 selects Ramp to Stop. H5-04 = 0 selects Ramp to Stop.
The deceleration time or the slope of the ramp is determined by the setting of drive parameter C1-02. H5-04 = 1
selects Coast to Stop. The drive does not attempt to control the rate of deceleration. H5-04 = 2 selects Fast Stop. The
deceleration time is determined by the setting of drive parameter C1-09.
Note:
The behavior of the drive at cable loss is controlled by parameter H5-04. This drive parameter works with the points as described in the table
above to determine how the drive will respond to a cable loss. If the cable loss fault is disabled, the drive will continue in its last state, if
running the drive will continue to run at the last commanded frequency.
Stop with Fault (CE)
In this mode, CBL LOSS TMR (POINT 92) is set to the desired interval, COMM FLT ENA (POINT 90) or is set to
"ON" and either CMD RUN.FWD (Point 22) or CMD RUN.REV (Point 24) is also set to "ON". If the time between
messages exceeds the timeout interval, a "CE" fault is declared and the drive stops. The stopping method is controlled
by the setting of H5-04 and is described above. CBL LOSS FRQ (POINT 91) is ignored.
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Mailbox Functions
This section defines the APOGEE FLN points that read and write parameters.
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Reading a Parameter
These two are the points to read any parameter:
• #70: Specifies the parameter to be read from
• #71: Reports the value of the parameter specified in Point #70
When this point is read, it retrieves data from the parameter and sends it to the controller.
Example:
1. Writing a value of 387 (183H) to Point #70 specifies parameter b1-04 [Reverse Operation Selection].
2. Reading Point #71 returns the current setting of b1-04 to the controller.
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Writing to a Drive Parameter
Two two are the points to write to any drive parameter:
• #72: Specifies the parameter to be written to
• #73: Entry location of the value to be written to the parameter specified in Point #72
When this point is written to, it will write the value to the drive. An enter or accept command does not need to be sent
for the data to be taken by the drive. The behavior of the write is the same as with the keypad. If the drive is running,
there are a limited number of drive parameters that can be written to.
Example:
1. Writing a value of 387 (183H) to Point #72 specifies drive parameter b1-04 [Reverse Operation Selection].
2. Writing a value of 1 to Point #73 enables the drive for reverse run.
YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
10.4 APOGEE FLN (P1) Communications
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