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TEXT DISPLAY LCA 042
15
-
CONNECTION OF THE PROGRAMMABLE CONTROLLER
CPU INPUT INPUT OUTPUT OUTPUT
SIMATIC
S5-115U
EBERLE
PLS 508
1) For increased protection against
interference you should wire the
connection “0V Signal”.
MESSAGE or TEXTNUMBER FUNCTION POWER
5 17 4 16 3 15 2 14 1 8 20 7 22 10 11 24 25
BCD 001/BIN 001
BCD 002/BIN 002
BCD 004/BIN 004
BCD 008/BIN 008
BCD 010/BIN 016
0V, GND
0V Signal
1)
+24 V=
BCD 020/BIN 032
BCD 040/BIN 064
CLOCK
TEXT/VARIABLE
DIRECT/SEQUENTIAL
BCD 080/BIN 128
BCD 100
1.1
CONNECTION OF THE PROG. CONT.
The parallel interface is the most important connection
be-tween the machine (controller) and the text display
LCA 042. All significant functions of the LCA 042 are
performed via this interface. These functions are:
- invoking the message texts (max. 200)
- invoking the message variants (functions)
- entering external variables
All inputs are high-active (Ri = 2.6k
Ω
)
BIN
0... 199
BCD
0... 199
= coded message number
CLOCK
= 1. invoke additional messages
2. display external variables on text display
3. invoke further messages
(at first message)
TEXT/VARIABLE
= switch between message text and
external variable
DIRECT/SEQUENTIAL
= switch between direct message and first
message (sequential display)
The connection to the programmable controller is made
via industrial adapter LCA 020 or round cable LCA 038.
Text display LCA 042 distinguishes between PROGRAM-
MING and OPERATION. During programming operation of
the LCA 042 is not possible.
Before the LCA 042 is put into operation the following
preparations must be made:
1. initialize
2. store message texts
3. determine positions of variables by means of place
holders