Yaskawa YASNAC PC NC PLC Programming Manual - Manual (Page 155)

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YASNAC PCNC PLC Programming Manual Chapter 8: Online Editing
8.3 Ladder Display Function
The ladder display function displays the sequence program stored in the NC in ladder form.
One line of ladder can contain a maximum of 13 contacts; the maximum number of contacts that
can be displayed in a sequence ladder is 100. There are no limits on the number of lines as long
as the maximum number of contacts is within the limit.
Each instruction indicated in Table 8.1 is counted to have the specified number of contacts.
Table 8.3.1 List of Instructions that have Multiple Number of Contacts
8.3.1 BT/TOP (Bottom/Top) Function
The function searches and displays the top line or the bottom line of the sequence ladder.
This key is a toggle.
8.3.2 SYM DIS (Symbol Display) Function
This function displays the symbol name of the contact which is set by the symbol pseudo
instruction “SYMBOL”.
This key is a toggle-each time the key is pressed, the symbol display is given and cleared.
Instruction
Number of
Contacts
Instruction
Number of
Contacts
Instruction
Number of
Contacts
INR 2 ANR 3 CMRW 2
DCR 2 ORR 3 CORW 3
CLR 2 XRR 3 CPRW 3
CMR 2 CPR 3 MVIW 3
ADI 3 COR 3 DSTW 3
SBI 3 MOV 3 JMP 2
ANI 3 DST 3 ADR 2
ORI 3 DIN 4 IPSH 2
XRI 3 ADC 3 APSH 2
DEC 3 ADDW 3 PUSH 2
COI 3 SUBW 3 TPSH 2
CMP 3 MULW 3 IPSHD 3
CPI 3 DIVW 3 TMR 3
MVI 3 INRW 2 TIM 3
ADD 3 DCRW 2 SUBP 3
SUB 3 CLRW 2