Yaskawa YASNAC PC NC PLC Programming Manual - Manual (Page 29)

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YASNAC PCNC PLC Programming Manual Chapter 5: Address Numbers And Map
The internal relay and its contact are expressed by the following symbol.
There are no limits to the number of contacts (NO and NC contacts) as long as the
program capacity is not exceeded.
• The address used for registers cannot be used for internal relays.
(6) Addresses of Internal Registers (#1200 to #2994; excluding #1300 to #1399 and #1700 to
#1799)
For the general-purpose one-byte (eight bits) register, address #1200 to #2994 (excluding
#1300 to #1399 and #1700 to #1799) are assigned.
These registers are used for register instruction and workpiece address for macro instructions,
• One address number corresponds to a one-byte register.
Example:
• For the registers, the address number itself is used as the symbol in a ladder.
Example:
• The address used for internal relays cannot be used for registers.