Simatic 505 SoftShop
6 - Programming
••••
87
7.
If the sticky cursor has not been turned on in the Program Setup
then after the instruction has been dropped into place the
pointer returns to an arrow.
To Enter Mnemonic Instructions with the Keyboard:
1.
In the active logic program, position the cursor (by using the
arrow keys) where the instruction is to be located.
2.
Type in the instruction mnemonic at the cursor location and
press ENTER. If you forget an instruction mnemonic just enter
a ? and press enter. The following mnemonic pick list will be
displayed. Pick the mnemonic you desire by double clicking on
the mnemonic or arrow to the mnemonic and press ENTER.
The mnemonic pick list will also display if an illegal mnemonic
is entered.
Figure 6.1
3.
The following is a list of all 505 ladder instruction mnemonics:
Mnemonic
Instruction
ABS
Take absolute value of a word.
ADD
Addition.
BITC
Clears a specified bit.
BITP
Examines status of a specified bit.
BITS
Sets a specified bit.
J
Creates Down line
U
Creates Up line
H
Draws horizontal line
CBD
Converts binary to BCD value.
CDB
Converts BCD inputs to binary.
CMP
Compare.
CTR
Counts recurring events.
DCAT
Discrete control alarm timer.
DCMP
Compares current date with a
specified date.
DIV
Division