3. Instruction Set
3-483
API Mnemonic Operands Function
275~
280
FLD※ Floating Point Contact Type
Comparison LD※
Controllers
ES2/EX2 SS2 SA2
SE SX2
Bit Devices Word devices Program Steps Type
OP X Y M S K H KnX KnY KnM KnS T C D E F
S1 * * *
S2 * * *
FLD※: 9 steps
PULSE 16-bit 32-bit
ES2/EX2 SS2 SA2
SE SX2 ES2/EX2 SS2 SA2
SE SX2 ES2/EX2 SS2 SA2
SE SX2
Operands:
S1: Source device 1 S2: Source device 2
Explanations:
1. This instruction compares the content in S1 and S2. Take “FLD=” for example, if the result is “=”,
the continuity of the instruction is enabled. If the result is “≠”, the continuity of the instruction is
disabled.
2. The user can specify the floating point value directly into operands S1 and S2 (e.g. F1.2) or
store the floating point value in D registers for further operation.
3. FLD※ instruction is used for direct connection with left hand bus bar.
API No. 32 -bit instruction Continuity condition Discontinuity condition
275 FLD＝ S1＝S2 S1≠S2
276 FLD＞ S1＞S2 S1≦S2
277 FLD＜ S1＜S2 S1≧S2
278 FLD＜＞ S1≠S2 S1＝S2
279 FLD＜＝ S1≦S2 S1＞S2
280 FLD＞＝ S1≧S2 S1＜S2
Program Example:
When the content in D200(D201) ≤ F1.2 and X1 is ON, Y21 = ON and latched.
FLD<= D200 F1.2 X1 SET Y21