Siemens SIMATIC 505 User Manual page 93

Simatic 505 SoftShop
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
ABS
ADD
BITC
BITP
BITS
J
U
H
CBD
CDB
CMP
CTR
DCAT
DCMP
DIV
Instruction
Take absolute value of a word.
Addition.
Clears a specified bit.
Examines status of a specified bit.
Sets a specified bit.
Creates Down line
Creates Up line
Draws horizontal line
Converts binary to BCD value.
Converts BCD inputs to binary.
Compare.
Counts recurring events.
Discrete control alarm timer.
Compares current date with a
specified date.
Division
6 - Programming • • • • 87