Nc -> Plc Interface Signal - Mitsubishi Electric M800VW Series Programming Manual

M800V/M80V Series PLC Programming Manual (2/2)
14 PLC Help Function
14.36 External Search
 External search strobe
The NC starts the external search at the rising edge of this signal.
The block specified with program No. (R2526), sequence No. (R2528) and block No. (R2530) are searched. When either or
both of the program No. and sequence No. are omitted, the operation differs as shown in the table below.
Program No. (R2526) Sequence No. (R2528)
Designated Designated
Designated Not designated (*1)
Not designated (*1) Designated
Not designated (*1) Not designated (*1)
(*1) "Not designated" indicates that the value of the signal is "0" (OFF).
14.36.3 NC -> PLC Interface Signal
Signal name
External search finished
External search status
 External search finished
This turns ON when the external search is finished. This also turns ON when an error occurs.
This signal turns OFF when the "External search strobe signal" is turned OFF from the user PLC.
 External search status
The status at the end of the external search is output.
Refer to "External search status".
Timing chart
The timing chart for the external search is shown below.
External search strobe
(PLC NC)
Processing external search
(NC internal state)
External search finished signal
(NC PLC)
External search status
(NC PLC)
IB-1501668-B
Start point to search the block No. (R2530)
Designated sequence No. for designated program
Head of designated program
Designated sequence No. in currently selected program
Error: 4
Refer to the section of "External search status" (R500).
1st part 2nd part 3rd part
system system system
XC1D XD5D XE9D
R500 R700 R900
search completed
868
Part system No.
4th part sys- 5th part 6th part
tem system system
XFDD X111D X125D
R1100 R1300 R1500
7th part 8th part sys-
system tem
X139D X14DD
R1700 R1900