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 112 of 160
The modular unit responds with "A<cr>" prior to changing it's baud rate. Any
further communications must be performed at the new baud rate. (See next
command to store this value.
"SE<cr>" 7. Store all default values. This command causes all storable data to be stored in
the EEPROM, so that they will be in effect at power up.
When the baud rate is changed by the command above, this command should be
given at the new baud rate, if it is desired for the modular unit to be at the new
baud rate after power has been removed and re-applied. It should be noted that if
the display units had been changed prior to using this command, then the new
units will be displayed the next time that power is applied. The response to this
command is "A<cr>".
The configuration of the Modular unit (i.e. what relays and types of sensors are
plugged in and what their assignments are) can be determined through the use of
several commands.
"AR<cr>" 1. Send the relay configuration. The modular unit will respond with the relay
configuration in one of these formats:
"RY=0,0" "RY=1,0" "RY=0,2" or "RY=1,2" depending on which relay modules are
inserted. Each relay module contains four relays. These are referred to as PCR1,
PCR2, ....etc. The first module, if installed, provides PCR1 through PCR4. A
second module, if installed, provides PCR5 through PCR8.
"DI<cr>" 2. Have the Modular unit perform self-diagnostics, and report the results. The
typical form of the response is "P15L N12H ...", where "P15L" means that the plus
fifteen volt supply is low, and "N12H" means that the negative twelve volt supply is
high (absolute). If there are no faults, the response is "NO-err".
"Sx<cr>" 3. Send module type for a specific station. The modular unit responds with the
sensor type that is installed in station "x". For example if "S1<cr>" were sent, and
station number 1 contained a Model 2A thermocouple module, the response would
be "S1=2A<cr>". If station 1 were not occupied, the response would be
"S2=none<cr>". If the configuration test showed a faulty unit, the response would
be "S2=flty<cr>".
Successive use of this command (up to ten station max.) will indicate the make-up
of the modular unit with respect to its complement of stations.
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