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PLC signals importation from external conditions
SYNCHK_Ry (Function ID: 561001)
PLC signals for relay selection relating to SYNCHK2
SYNCHK2 (Function ID: 560001)
DPSY01 (Function ID: 511001)
SYNCHK2 (Function ID: 560001)
Check for synchronous network
Check for asynchronous network
Figure 4.6-15 Synchronization check logic in SYNCHK2
(ii) Check logic and settings for synchronous network
As shown in Figure 4.6-14, the ∆V, ∆θ, and ∆f signals are required to check the synchronous
condition; the three signals are input to the logic. The sync-success signal “SYNC01_SYN_CLC”
is provided after the operation of the delay timer “SYNC01_TSYN”. The user can regulate the
timer using the setting [SYNC01_TSYN].
(iii) Check logic and settings for asynchronous network
In Figure 4.6-14, the ‘∆θ1≈0’ and ‘∆θ1_less’ signals are used to check the synchronization
condition when the user sets On for scheme switch [SYNC01-Split_SYN_EN]; subsequently
sequentially the sync-success signal “SYNC01_SYN_CLC” is issued for the DPSY01 function.
(iv) Bypassing synchronization check
If the user wishes to remove the synchronization check, set Off for the scheme switch [SYNC01-
SYNCHK1EN]. The DPSY01 function can operate with the absence of the sync-success signal
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