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Chapter 2
Module Setup Procedures
2.4 Switch S4
=
Gate Signal Conditioning
Switch S4 is used to change the transition direction of the
gate input signals that feed the interrupt system of the
6ES5 242 module. The first three external gate signals, G1 -63,
are fed to three of the interrupt lines of the AM 9519 interrupt
controller chip.
This allows use of any of the three external gate inputs to
trigger an interrupt for the module. The Interrupt Mask Register
must be set accordingly to enable the gate interrupts. Note
also that the external gate signals are first routed through
switch S6.
The AM 9519 interrupt controller chip is firmware programmed
'to allow a 0 to 1 transition. You must determine which type
of external gate transition will be used (1 to 0 or 0 to l), and
set switch S4 accordingly.
@
Jumper
Description
G1 external gate input to AM 9519.
G2 external gate input to AM 9519.
G3 external gate input to AM 9519.
G4 external gate input, not used.
Jumper closed = 0 to 1 transition, rising edge.
Jumper open = 1 to 0 transition, falling edge.
2.5 Switch S5
-
Counter lnput Routing
Switch S5 is used to physically connect the input to each
of the five counter inputs of the AM 9513 to either the external
counter input or the FOUT signal. The external counter input
is routed through optocoupling from the connectors located
on the front of the module (see section 2.8.1, Plug Connector).
The FOUT signal is an output of the AM 9513 counter chip
which can be programmed by the user (see section 3.3,
Master Mode Register).
For example, if you connect the counter input of counter l to
the FOUT signal and you would like to use the FOUT signal
for an input to counter 2, you would specify counter 1 as
the pulse source in the counter mode register of counter 2.
Counter
External Input
F2 Scaler (FOUT)
1
1 - 2 0
2
-
20
2
3
-
18
4 - 1 8
3
5 - 1 6
6 - 1 6
4
7 - 1 4
8
-
14
5
9
-
12
10
-
12
2.6 Switch S6
-
Gate lnput Routing
Switch S6 is used to physically connect the input to each of
the five gate inputs of the AM 9513 to either the external gate
input or the FOUT signal. The external gate input is routed
through optocoupling from the connectors located on the front
of the module (see section 2.8.1, Plug Connector). The FOUT
signal is an output of the AM 9513 counter chip which can
be programmed by the user (see section 3.3, Master Mode
Register).
For example, if you connect the gate control input of counter 1
to the FOUT signal, and you would like to use the FOUT
signal for an input to counter 2, you would specify counter
1 as the pulse source in the counter mode register of counter 2.
Gate
External Input
F2 Scaler (FOUT)
2.7 Jumper Assignments
There are several solder type jumpers which are installed on
the 6ES5 242 module. Their meanings are listed below.
Jumper
Delivery State
Description
A
-
B
closed
Used for testing
C - D
open
Used to enable de coding of
byte a
E - F
closed
Used for module addressing
in conjunction with swith S1.
G - H
open
Used to determine if the
module is a master (open)
or slave (closed).
I - K
closed
Used to determine if the
module is reset with the
system CPKL' signal
L- M
open
Is used to enable (closed)
the TRAP interrupt routine
stored in firmware for 8085.
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