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Siemens CPU 412-1 Instruction Manual Page 48

S7-400; cpu 412 series; cpu 414 series; cpu 416 series; cpu 417 series;.
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Counter Instructions, continued
In-
In-
struc-
struc-
Address ID
Address ID
tion
CD
C f
Decrement counter by 1 on edge
C [e]
change from "0" to "1"
FR
C f
Enable counter on edge change
C [e]
from "0" to "1" (reset edge bit
memory for up and down
memory for up and down
Counter para.
counting and setting the counter)
Status word for:
CD, FR
Instruction evaluates:
Instruction affects:
+
Plus time required for loading the address of the instruction (see page 20)
1)
With direct instruction addressing Counter No.: 0 to 255
S7-400 Instruction List
A5E00267845-01
Length
Length
in
in
Description
Description
Words
1)
1
1)
1
2
BR
CC1
Execution Time in ms
Execution Time in ms
CPU 412
CPU 414
/2
0.2
0.12
0..2+
0.2+
/2
0.2
0.12
0.2+
0.12+
0.2+
0.12+
CC0
OV
OS
Counter Instructions
CPU 416
CPU 417
0.08
0.06
0.08+
0.06+
0.08
0.06
0.08+
0.06+
0.08+
0.06+
OR
STA
RLO
Yes
0
/FC
0
46

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