Indexing Of Devices - Mitsubishi Electric MELSEC FX3U Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition

4.11.3 Indexing of devices

Available devices and the contents of indexing are as described below:
Decimal devices/numeric values: M, S, T, C, D, R, KnM, KnS, P and K
For example, when "V0 = K5" is specified and "D20V0" is executed, an instruction is executed for the device
number D25 (D20 + 5).
Constants can be indexed also. When "K30V0" is specified, an instruction is executed for decimal value K35
(30 + 5).
Octal devices: X, Y, KnX and KnY
For example, when "Z1 = K8" is specified and "X0Z1" is executed, an instruction is executed for the device
number X10 (X0 + 8: addition of octal value). When indexing for a device whose device number is handled in
octal, a numeric value converted into octal is added for the contents of V and Z.
Accordingly, note that when "Z1 = K10" is specified "X0Z1" indicates that X12 is specified, and X10 is not
specified.
Hexadecimal numeric values: H
For example, when "V5 = K30" is specified and a constant "H30V5" is specified, it is handled as H4E (30H +
K30). When "V5 = H30" is specified and a constant "H30V5" is specified, it is handled as H60 (30H + 30H).
→ For indexing method and cautions, refer to Section 5.7.
4 Devices in Detail
4.11 Index Register [V and Z]
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5
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10