Honeywell Mini-AT, User Manual, Page: 114 / 156

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Page 114
Mini-AT User Guide
Item
No. Item Name Description
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169 RATE DEAD BAND A hysteresis band that provides a buffer below the Rate High Limit
(item 164) when the Rate High Alarm is automatically cleared by
RBX operation. The user-specified value determines the
magnitude of the band. The flow rate calculation (item 209) must
pass completely through the dead band before the flow rate alarm is
automatically cleared.
Default = 2 xyz/HR
Where: xyz = the CorVol unit selected at item 090
170 PROTOCOL CODE A Selection ( 0-1 ) to determine if a specific Mercury Protocol error
code is transmitted while attempting a serial link sign-on. When
this function is set to “0”, (which is the recommended setting for
most applications) all instrument error codes are transmitted as in
previous versions of firmware. When this item is set to “1”, the
Mini-AT will not send time-out errors during serial
communications. The selection of “1” is provided as a
convenience for some 3rd party communication interfaces.
Select: 0 - Standard------ Default
1 - No Time-out Error
171 TIMEOUT DELAY1 The time (in seconds) the Mini-AT waits for the host computer to
send the protocol control character
“ENQ”
during instrument sign-
on before issuing an error “21” (timeout error). This function is
provided as a convenience for some 3rd party communication
interfaces and under most situations, should not be changed from
the default setting.
Range: 7 to 60
Default
= 7
172 TIMEOUT DELAY2 The time (in seconds) the Mini-AT waits for a valid
“sign-on”
from the host computer after receiving the protocol control
character “ENQ” before issuing an error “21” (timeout error). This
function is provided as a convenience for some 3rd party
communication interfaces and under most situations, should not be
changed from the default setting.
Range: 7 to 60
Default
= 7
173 REPORT TRIGGER 9 When activated, this trigger will cause an audit trail entry to time-
stamp
Hardware Resets
. A Hardware Reset occurs when the
microprocessor receives an interrupt from the low-voltage detector,
indicating the instrument’s main power dropped below 4.3 volts.
This situation can occur while the instrument is ‘asleep’, therefore,
would not produce a Low Battery Alarm or “HELP” shutdown.
Select:
0
- Inactive
1
- Activated-----
Default