CT34002a_e.doc / Nov-15
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3.4.
Control Inputs Cont.1 – Cont.4
These inputs can be configured for remote functions like Reset, Start, Cutting Pulse, Immediate
cut or display selection purpose.
All control inputs require HTL level. They can be individually set to either NPN (switch to -) or
PNP (switch to +) characteristics. For applications where edge-triggered action is needed, the
menu allows to set the active edge (rising or falling). The Control inputs will also accept signals
with Namur (2-wire) standard.
For reliable operation of the Control Inputs a minimum impulse duration of
50 µs must be ensured. Especially when using the Z marker pulse of a HTL
encoder as cutting pulse, please verify that this minimum duration can be kept
even with maximum speed of the machine
3.5.
Switching Outputs K1 – K4
CT340 provides four digital outputs to signal control states like Homing Done, Alarm or Error.
K1 – K4 are fast-switching and short-circuit-proof transistor outputs with a switching capability
of 5 – 30 volts / 350 mA each. The switching voltage of the outputs must be applied remotely
to the Com+ input (terminal 29)
3.6.
Serial Interface
The serial RS232 interface can be used for the following purposes:
Set-up of the unit by PC with use of the OS32 PC software
Remote change of parameters during operation
Remote readout of actual values by PLC or PC
The figure below explains the connection between the CT340 unit and a PC using the standard
Sub-D-9 serial connector
2
3
5
RxD
TxD
GND
screen
PC
CT 340
14
(Sub-D-9)
30
31
TxD
RxD
For details of the serial communication protocol, please refer to the special “Serpro” manual.
3.7.
Analogue Outputs
The unit provides a voltage output of +/- 10 volts (load = 3 mA), and a current output of
0 – 20 mA (load = 0 – 270 Ohms), both at a resolution of 14 bits (13 bits + sign).
With most standard applications the voltage output is used as a speed reference signal,
connected to the speed input of the cutting roll drive.
