Separate Interrupt Lnputmodule; Interruptprocessing Inthe S5-135U - Siemens SIMATIC S5 1P 243 Equipment Manual

Interrupt Processing
4.4
Separate Interrupt Input Module
If a programmable controller is designed for fundamental mode operation (level–triggered
mode), i.e., the CPU only reacts when a certain level is active on the interrupt lines, or if a control
without interrupt lines on the S5 bus is involved, interrupts can only be evaluated by means of a
separate binary input module with process interrupt generation. The CPUS of systems S5–135U
(CPU 922 and CPU 928A/B when parameterized accordingly) and S5–155WH oPerate in
level–triggered mode. For devices without interrupt lines, the interrupt scan is made via the input
byte O. This applies to the S5–150S and S5–150U controllers. If interrupt processing is desired
for one of the aforementioned systems, replace the memory latch D9 on the 1P 243 with the
soldering base D9, included with delivery. In addition an interrupt module is required.
4.4.1 Interrupt Processing in the S5–135U
In the S5–135U programmable controller, both CPU 922 and CPU 928A/B operate in level–
triggered mode. The CPUS, however, can also be parameterized for edge–triggered processing.
In case of level–triggered operation, the digital input module6ES5432–4UA11 must be addition-
ally inserted. On the 1P 243 module, the comparator outputs and the interrupt–generating out-
puts of the gating logic must be jumper–connected to the soldering base D9, which in turn is
connected with the binary outputs of the 1P 243. Furthermore, the jumper connections on the sol-
dering base X19 (pins 11, 12, 13, 14, 15 and 16 connected to grounding M, pin 6) may not be
changed from their original delivery condition. Then the binary outputs are externally connected
to the inputs of the interrupt module. The interrupt triggering is handled exclusively by the module
6ES5432-4UA1 1. A description is found in the appropriate equipment manual.
When working with a separate interrupt input module, the 1P 243 can
operate from any 1P slot, whether in the central unit or in an expan– sion
unit. The interrupt module 6ES5432–4UA1 1, however, must always be
inserted in the central unit.
Several interrupts from one 1P 243 or from different IPs 243 can be routed to a digital module with
the capability of process interrupt generation.
Example:
In the S5–135U with CPU 922the two analog input values AIOand All are applied tothe difference
amplifier. The amplifier output runs to +comp. and is compared with –comp. which is connected
to the input A16. If the value at the A16 channel exceeds the output voltage at the difference amplifi-
er, an interrupt is generated and a value which was previously filed in FW 120 is output at A02 via
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