Basic Function Instruction
6 -19
FUN 5
DIFD
DIFFERENTIAL DOWN
FUN 5
DIFD
Symbol
Operand
N: a specific coil number where the result of
the Differential Down operation is stored.
Y
M
SM
S
Range
Ope-
rand
Y0
∣
Y255
M0
∣
M1911
M1912
∣
M2001
S0
∣
S999
D
○
○
○
*
○
Description
●
The DIFD instruction is used to output the down differentiation of a node status (status input to "TG
↓
") and
the pulse signal resulting from the status change at the falling edge of the "TG
↓
" for one scan time is
stored to a coil specified by D.
●
The functionality of this instruction can also be achieved by using a TD contact.
Example
The results of the following two samples are exactly the same
Ladder Diagram
Key Operations
Mnemonic Codes
Example 1
Y 0
X1
TG
5.
DIFD
ORG
FUN
ORG X
1
FUN 5
D
:
Y
0
Example 2
Y0
X1
ORG
OUT
ORG TD X
1
OUT Y
0
X1
Y0
t : scan time
t
Содержание FBs-CBE
Страница 78: ...MEMO ...
Страница 111: ...4 6 X0 X1 Node A Y0 Y1 Node B differential down Incerse differential up t Scan time Inverse t t ...
Страница 141: ...Basic Function Instruction 6 16 FUN 2 SKP SKIP START FUN 2 SKP Y2 Y1 Y0 T201 10S X0 X1 X2 0 10 0 ...
Страница 305: ...MEMO ...
Страница 348: ...MEMO ...