Vaisala HMP228 User Manual
Page 83
HMP228
M210282en-A
Appendix 4: RS 485/422 serial port module
77
APPENDIX 4: INSTALLING AND USING THE RS 485/422 SERIAL
PORT MODULE
1. INSTALLATION ..................................................................................................................... 78
2. OPERATION .......................................................................................................................... 79
3. NETWORK CONFIGURATION .............................................................................................. 81
Single loop operation ....................................................................................................... 81
Dual loop operation .......................................................................................................... 83
4. CHECKING THE SERIAL PORT NETWORK OPERATION.................................................... 85
STOP mode ....................................................................................................................... 85
POLL mode ....................................................................................................................... 86
RS 485 network settings .................................................................................................. 86
5. SPECIFICATIONS ................................................................................................................. 87