INSTRUMENT MANUAL
VACUUM GAUGE MODEL MM200
160Phone:(215) 947-2500 fax:(215) 947-7464 e-mail:sales@televac.com web site:www.televac.com
MM-200_im REV M
Page 127 of 160
RS232 The MM200 uses a DE9S connector (female) for RS232
HARDWARE and the RS485 hardware interface. The pinouts are in accordance with Fig. 6.1
and Table 6.1.
PIN FUNCTION
2 Tx - from MM200
3 Rx - to MM200
4 DTR - to MM200
5 GROUND
6 DSR - TO MM200
7 DO NOT USE
8 DO NOT USE
5 1
o o o o o
o o o o
9 6
SPECIAL COMMANDS
The following commands are for factory and servicing use, and are not for
publication. They require use of the password.
CDxx,yy<cr> Change RAM byte @xxH to yyH.
CN<cr> Change from "cal" to normal unit (can be stored).
CP<cr> Clear password.
CU<cr> Change from normal to "cal" unit (can be stored).
DF<cr> Turn "off" the watchdog.
DN<cr> Turn "on" the watchdog.
EP<cr> Enter password.
RCnnnn<cr> Read code starting at nnnnH.
RD<cr> Read MPU RAM.
SF<cr> Show the fault displays (one time each).
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