communication available.
... and rapid set-up of a particular operational requirement
1 First define the specification and decide on the required PCS (PCS micro, PCS
mini, PCS midi or PCS maxi)
2 Allocate the word and bit number to variables (actual- and nominal values).
3 Create the texts for operational guidance and help functions as well as for
displays of machine conditions.
4 Determine the message texts and apply these words to them, subdivide the
message texts into 3 priority groups
■ Information
■ Warnings
■ Faults
and take into consideration the differing cancel modes, display and message
modes. Display and message modes can be altered by the PLC at any time.
5 Define the menus and the menu operating texts.
6 Transfer the data file (variables, texts, menus) which was made in the PC or PG
under MSDOS/DRDOS or compatible DOS-system, with the software PCSPRO
into the PCS.
7 Implement and parameterize the PLC specific operating software (PCS 91.nn,
see overall view of information) in the users' programme.
8 Connect the PCS via the adapter cable with the PLC. Test together the operation
and control of the PCS and PLC and adjust if necessary
Machines produce different parts. Therefore quick and selective alterations of finished
sizes and functions (variables) are especially important for increased flexibility.
The PCS features a convenient method of processing the variables. 650 external variables (freely definable) and 6 internal variables are supervised from the PCS.
The value of the external variables are stoped in the words
30...255. The PCS differentiates
between actual values and nominal values:
ACTUAL: The value in the word
is the actual value. The PCS can
only display the value.
NOMINAL: The standing value
in the word is the nominal value.
The value can be displayed and
changed by the PCS.
NOMINAL VALUE-P: The private value in the word is a nominal value. The PCS can display
the value. It can be changed only
if this is allowed by the word 14
bit 7 = log 1 (key switch or DILswitch 1...4 on the rear side of
the PCS). When the bit 7 of word
14 = log 0, the display of the
actual value follows.
Internal Variables
NAME CONTENTS FORMAT LENGTH ACTUAL/NOMINAL
ZP NUMBER OF INFORMATIONS BIN 3 ACTUAL
ZQ NUMBER OF WARNINGS BIN 3 ACTUAL
ZR NUMBER OF FAULTS BIN 3 ACTUAL
ZT MENU NUMBER BIN 2 ACTUAL
ZV SCROLL TIME BIN 2 NOMINAL
ZX INTERFACE FAULTS BIN 2 ACTUAL
External Variables
FORMAT, LENGTH
BIT variable max. length 40 characters
STRING variable max. length 40 characters
CSTRING variable max. length 40 characters
WORD variable KM, KH, KY: length: 17, 4, 7 characters
ASCII variable max. length 16 characters
BCD-1 variable max. length 4 digits
BCD0-1 variable *) max. length 4 digits
BCD-2 variable max. length 8 digits
BCD0-2 variable *) max. length 8 digits
BIN-1, BIN-A variable max. length 16 bits/11 digits
BIN0-1, BIN0-A variable *) max. length 16 bits/11 digits
BIN-2, BIN-B variable max. length 32 bits/11 digits
BIN0-2, BIN0-B variable *) max. length 32 bits/11 digits
VBIN-1, VBIN-A variable max. length 16 bits/11 digits + operational sign
VBIN0-1, VBIN0-A variable *) max. length 16 bits/11 digits + operational sign
VBIN-2,V BIN-B variable max. length 32 bits/11 digits + operational sign
VBIN0-2, VBIN0-B variable *) max. length 32 bits/11 digits + operational sign
Timer variable max. length 40 characters
*) BIN0...- and VBIN0... variable are only programmable with PCSPRO
The BIT variable
When two possibilities can be selected at an input, the descision is taken by the bit
variable. This is in the form of an ON/OFF switch.
Every switch position represents an inscription (text) which appears in the display.
Each bit variable occupies a bit. A data word can also take on up to 16 differing bit
variables or switches.
Example: A wood shavings vacuum absorption cleaner shall be switched on or off
in bit 2 data word 33.
The +/- switch selects the inscription or the switching position. The bit bears the value
of the inscription. The first inscription carries the value log 0, the second bears the
value log 1.
STRING variable
When two or more possibilities can be selected at an input, the decision is made by
the STRING variable. It corresponds to a selector switch.
With STRING variables, every switch position is classified with an inscribed text, which
appears in the display. Every STRING value carries a data word with up to 256 switch
positions. The switch position is deposited in low bytes of the data word.
Example: The frame material shall be selected in data word 40.
The inscription or switching position is selected with the +/- key. Acceptance follows
with the ENTER key.
CSTRING variable
The CSTRING variable corresponds to STRING variable. Acceptance follows directly
after using the +/- key without ENTER.