Fuji Electric FRENIC-VG Series, Руководство пользователя

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6.15.10 Synchronization of E-SX bus tact cycle and inverter control
cycle
6.15.10.1 Conditions required for tact synchronization
Connecting the card to the E-SX bus makes it possible to synchronize the E-SX bus tact cycle and the
inverter control cycle. By doing this, the control timing of multiple inverters can be synchronized,
making it easy to implement control that requires high-accuracy timing.
However, the processing that synchronizes the inverter control cycle and the E-SX bus tact cycle
requires that the following conditions (1) and (2) both be satisfied. If either condition is not satisfied, the
tact cycle and inverter control cycle will operate asynchronously. When the conditions are both satisfied,
synchronization is performed automatically after E-SX bus communication is established.
Table 6.15.9 Tact Synchronization Conditions
Synchronization condition
Condition (1) The E-SX bus tact cycle is one of the following (recommended tact cycles are underlined).
*1
0.25 ms
，
0.5 ms
，
0.75 ms
，
1 ms
，
1.25 ms
，
1.5 ms
，
1.75 ms
2 ms
，
2.5 ms
，
3 ms
，
3.5 ms
，
4 ms
，
4.5 ms
，
5 ms
，
5.5 ms
，
6 ms
6.5 ms
，
7 ms
，
7.5 ms
，
8 ms
，
8.5 ms
，
9 ms
，
9.5 ms
，
10 ms
Condition (2) Inverter function code F26 "Carrier Frequency" is set to either of the following frequencies.
*2
4 kHz
，
8 kHz
*1 If the tact cycle is other than a recommended cycle, the control cycle timing will not be the same for multiple
inverters.
*2 When F26 "Carrier Frequency" is set to other than 4 kHz or 8 kHz, set the bus tact cycle to 0.5 ms or more.
6.15.10.2 Checking the tact synchronization status
The tact synchronization status can be checked by the methods indicated in Table 6.15.10.
Table 6.15.10 Tact Synchronization Status
Method Operation
Function of Y terminal C-Do10 Tact synchronizing: C-Do10 = ON
*1
Function code M142 Tact synchronizing: M142 bit 0 = 1
*2
*1 To assign C-Do10 to the Y terminal, refer to E15 to E27, Y function selection in Chapter 4, Section 4.3 "Details
of Function Codes."
*2 Can be checked in the data confirmation screen of the keypad even if C-Do10 is not assigned to the Y terminal.
6.15.10.3 Action when synchronization is lost ( are )
If synchronization is lost due to noise or other cause after the E-SX bus tact cycle and inverter control
cycle are synchronized, the inverter operates as described below.
Table 6.15.11 Action When Synchronization is Lost
Error Operation
Synchronization is lost
" are " (alarm sub-code 1) occurs as an E-SX bus tact synchronization
error.
*1
Resynchronization is performed automatically, and " are " reset can take
place when resynchronization is completed.
*1 If the tact cycle or inverter function code F26 is changed during synchronization so that the synchronization
conditions are no longer met, synchronization will be lost; however,
are
will not occur in this case.
Note: Inverter function code H108 can be set to display
l-al
and continue operation when an alarm occurs. Refer
to the explanation of H108 in Chapter 4, Section 4.3 "Details of Function Codes."