G.R.A.S. 12AQ, Instruction Manual

Page: 17 / 22

G.R.A.S. SOUND & VIBRATION
Power Module Type 12AQ
Page 17
4 .4 .2 Special commands
These are for regulating messages relating to overloads, and gaining information relating to the
Type 12AQ itself.
Command Effect
Msg Report any change in overload status within the conditioning amplifier.
Typical messages are:
OVL 1 on (channel 1 overloaded)
OVL 2 off (channel 2 overload ceases/removed)
Type Returns G.R.A.S. Type 12AQ .
Serial Returns, e.g. Serial no.: 12345 .
Firmware Returns, e.g. Firmware 1.1 or later version
As of Firmware version 1.3, the following option is valid:
Info
Returns, e.g. G.R.A.S. Type 12AQ
Serial no.: 12345, actual serial no.
Firmware ver. 1.3.0 or later
Option RP0001-S1 in Ch. 1*
Option RP0001-S2 in Ch. 2*
Option
Returns e.g.
Option RP0001-S1 in Ch. 1*
Option RP0001-S2 in Ch. 2*
or
No option installed.
Info
Equivalent of
Type
,
Serial
and
Info
.
4 .4 .3 Special Responses
These are automatic messages relating to changes of condition.
Message Meaning
Ready Type 12AQ is powered up or restarted
OVL # on Channel # overload (# is 1 or 2)
OVL # off Channel # overload ceases/removed (# is 1 or 2)
4 .5 Overload Responses
Note: The overload system consists of two independent systems, a manual user system and a
remote controlled system.
4 .5 .1 In Latched Mode
For each of the overload detectors, an internal overload-status flag indicates the actual overload
condition. The overload-status flag will be set when an overload occurs.
In the latched mode, the status flag will be set by an overload and can be reset only by removal
of the overload and by reading the overload status via the Ovl command.
4 .5 .2 In Message Mode (non-latched)
Whenever the state of the overload detectors are changed, a message will be submitted.
The typical messages submitted will be:
OVL 1 on
(channel 1 overloaded)
OVL 2 off
(channel 2 overload ceases/removed)
If an overload occurs while sending a command to the 12AQ, the overload status will not be
read immediately and no response be sent back until after the command has been processed.
This can take up to 5 ms because of setting up bi-stable relays.
* Providing customised network is installed