IAI America XSEL-QX - Manual (Page 140)

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Part 3 Controller Data Structure
(2) Virtual output ports
Port No. Function
7300
Latch cancellation output for a latch signal indicating that all operation cancellation factor is present
(port 7011. The latch is cancelled only when operation cancellation factor is no longer present.
7300 will be turned OFF following an attempt to cancel latch)
7301 ~ 7380 (For future expansion = Use strictly prohibited)
7381 ~ 7399 (For future expansion = Use strictly prohibited)
7400 ~ 7599 (For future expansion = Use strictly prohibited)