Renishaw PH10 Installation Guide download pdf (Page 28)

RS232 serial communications

4.1 RS232 connector pinouts

The PHC10-2 communicates with the CMM computer via the RS232 cable as shown in table 1.

Table 1 - RS232 connector points

Pin Signal

1 Screen

2 Transmitted data (Tx) to CMM computer

3 Received data (Rx) from CMM computer

4 RTS (Request To Send) to CMM computer

+12V after initialisation routine completed

5 CTS (Clear To Send) from CMM computer

CMM computer disasserts CTS to halt PHC10-2 transmissions

Connect pin 5 to pin 20 if CTS is not output from the CMM computer

7 Signal ground (common)

20 DTR (Data Terminal Ready) to CMM computer signiﬁes PHC10-2 power ON condition

4.2 Baud rate selection

The baud rate is set using switches 1 to 3 as shown in table 2 below:

Table 2 - Baud rate selection

Baud rate Switch 1 Switch 2 Switch 3

300

600

1200

2400

4800

9600

19200

DOWN

CAUTION: The PHC10-2 must be powered down and then powered up to allow any changes to

the rear panel switch settings to take effect.

4.3 Protocol selection

The RS232 version of the PHC10-2 has two switch-settable command sets (basic command set and

extended command set) offering different protocol options.

The command set selection is made using switch 9 on the rear panel.

Table 3 - Command set selection

Switch Position Selection

UP Extended command set mode

DOWN Basic command set mode

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 73 74

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Renishaw PH10 Installation Guide Page 28