Siemens SIMATIC 505 User Manual
1-2
Series 505 High Speed Counter
and Encoder Module User
’s Manual
1.1
Features
The Series 505
High Speed Counter (HSC) module (PPX:505-7002)
provides two independent high-speed counter channels.
Each channel has the following features.
Four counter modes:
Pulse counter
Quadrature counter modes: 1X, 2X, 4X
Quadrature counter modes: 1X, 2X, 4X
A 10 kHz count rate with a minimum pulse width of 25 s.
Four inputs:
Four inputs:
two count inputs
reset
inhibit
reset
inhibit
Two field outputs, each controlled by a separate programmable preset.
LED indicators display the status of the A and B count inputs, and of
LED indicators display the status of the A and B count inputs, and of
Y1 and Y2 outputs.
All inputs may be sinking or sourcing (with external 24 VDC power
supply).
supply).
The HSC module operates asynchronously from the controller scan. You
can program the controller to monitor the HSC and/or to provide high-level
control of the HSC’s operation. To support these functions, the HSC
provides reset, inhibit, output and counter status to the controller and
accepts reset and inhibit commands, and preset values from the controller.
can program the controller to monitor the HSC and/or to provide high-level
control of the HSC’s operation. To support these functions, the HSC
provides reset, inhibit, output and counter status to the controller and
accepts reset and inhibit commands, and preset values from the controller.
!
The HSC module controls its four outputs. If the controller switches from the Run
mode to the Program mode, the HSC continues to function as programmed, and
outputs may be activated by the HSC. This means that if you switch the controller
to Program mode, any devices controlled by the four outputs of the HSC will
continue to operate as programmed.
mode to the Program mode, the HSC continues to function as programmed, and
outputs may be activated by the HSC. This means that if you switch the controller
to Program mode, any devices controlled by the four outputs of the HSC will
continue to operate as programmed.