Yaskawa YASNAC PC NC PLC Programming Manual - Manual (Page 28)

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YASNAC PCNC PLC Programming Manual Chapter 5: Address Numbers And Map
(4) Addresses of Output Signals to the NC Main Section (#3000 to #3159)
For the signals output from the PLC to the NC main section, such as EDIT and MEM mode
selection signals, address #3000 to #3159 are assigned.
The correspondence between the signal name and the address is determined by the NC and
cannot be changed.
• One bit of address (#3000 to #3159) corresponds to one point of output signals.
Example:
• The output signals of #3000 to #3159 are expressed by the following symbols.
(5) Addresses of Internal Relays (#1200 to #2994; excluding #1300 to #1399 and #1700 to
#1799)
For the internal relays that can be used only in the PLC to create a sequence program
addresses #1200 to #2994 (excluding #1300 to #1399 and #1700 to #1799) are assigned.
• One bit of address of #1400s, for example, corresponds to one piece of internal relay.
Example:
• The number of usable internal relays is indicated below.
500 bytes × 8 bits = 4000 relays