Delta AS Series Programming Manual page 318

6.
When chkTR is ON, the actual device represented by VarTR1 is T0. Since the legal range of devices is from T0 to
T511, and T0+10-1=T9 which does not exceed the range, TR_ChkBit is ON.
7.
When chkCR is ON, the actual device represented by C511. Since the legal range of devices is from C0 to C511,
and C511+10-1=C520 which exceeds the range, CR_ChkBit is OFF.
8.
When chkHCR is ON, the actual device represented by HC50 is VarHCR1. Since the legal range of deices is from
HC0 to HC255, and HC50+10-1=HC59 which does not exceed the range, HCR_ChkBit is ON.
Additional remarks
1.
If the value (the actual device address) in S exceeds the device range, the CHKADR instruction is not executed,
SM is ON, and the error code in SR0 is 16#2003.
2.
If the value in the operand n is not between 1–1024, the CHKADR instruction is not executed, SM is ON, and the
error code in SR0 is 16#200B.
C h a p t e r 6 Ap p l i e d I n s t r u c t i o n s
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