Hardware; Technical Description; Mode Of Operation - Siemens SIMATIC S5 Manual

3

Hardware

Technical Description

3.1
3.1.1

Mode of Operation

The IP247 as an intelligent 1/0 module controls positioning equipment driven by stepper motors.
The IP247 outputs pulse trains to the connected stepper motor power unit corresponding to the
target position and the traversing speed, The number of pulses output determines the distance
travelled, the frequency of the pulses determines the speed of travel. A direction signal to indi-
cate the direction of travel is also output.
The module has the following features:
16-bit microprocessor with internal timer and interrupt controller (801 86)
16 Kbyte local RAM, backed up by the PC battery
EPROM cartridge interface for loading the firmware
dual-port RAM, backed up by the PC battery
bus interface to S5 programmable controllers
serial interface to S5 programmers
three interfaces to stepper motor power units
twelve 24 V digital inputs
three 24 V/l 20 mA digital outputs
two status LEDs.
The operation of the positioning module is controlled by the microprocessor according to the
operating program (firmware) stored in an exchangeable EPROM cartridge. The parameter as-
signment, programming and start- up are performed via the PG interface using the software pack-
age COM 247. If the data is stored in the CPU, parameter assignment and programming can also
be performed via the PC intertace, e.g. when exchanging a rmodule. Providing the module re-
mains plugged into a battery-backed PC frame, the machine data and machining programs
stored in the RAM of the IP247 are retained if a power failure occurs.
Communication with the programmable controller is via the S5 bus interface and a dual-port
RAM with a capacity of 4 Kbytes.
To connect stepper motor power units, the I P247 module has three identical interfaces with out-
puts at connectors X4,X5 and X6. You can connect both power units with optocoupler inputs (5
v/20
differential inputs. You select the type of input by setting jumpers on the module. When operat-
ing with voltages between 5 V and 24 V, you must apply this voltage to connector X7.
Technical Description
3-1