64
unlock operation also unlocks the parameters of the lower groups, while the lock
operation locks all the parameters. To choose new security codes requires
positioning of the internal dip-switches. In order to re-lock the different groups
insert any number with the exception of the selected codes.
AUTO/MANUAL SELECTION - Group 1
Available:
Only if the external keyboard circuit is fitted.
Upper display: Status for automatic/manual selection.
Lower display: A/M
Range:
LoCAL, CnCt. Select “LoCAL” to control the auto/manual function from the front
push-button “A/M” or serial communication interface. Select “CnCt”to activate the
external control of auto/man mode.
Default value:
LoCAL.
ALARM 1 THRESHOLD - Group 1
Available:
Only if A1.LNK is different than OFF.
Upper display: Alarm 1 threshold value
Lower display: AL1
Range:
From 0 to pressure input full scale value for process and band alarm. From -
pressure input full scale to + pressure input full scale for deviation alarm. The high
limit may be expanded to 110% of span if display capability allows it.
Default value:
5% of range.
ALARM 2 THRESHOLD - Group 1
Available:
Only if A2.LNK is different than OFF.
Upper display: Alarm 2 threshold value
Lower display: AL2
Range:
From 0 to pressure input full scale value for process and band alarm. From -
pressure input full scale to + pressure input full scale for deviation alarm. The high
limit may be expanded to 110% of span if display capability allows it.
Default value:
60% of range.
ALARM 3 THRESHOLD - Group 1
Available:
Only if A3.LNK is different than OFF.
Upper display: Alarm 3 threshold value
Lower display: AL3
Range:
From 0 to pressure input full scale value for process and band alarm. From -
pressure input full scale to + pressure input full scale for deviation alarm. The high
limit may be expanded to 110% of span if display capability allows it.
Default value:
80% of range.
Summary of Contents for ATC770
Page 19: ...ATC770 Microprocessor Based Pressure Process Controller 19 Fig 2 ATC770 Outline Drawing...
Page 23: ......
Page 30: ...30 Fig 6 Remote Set Point Jumper Location Board E...
Page 84: ...NOTES...
Page 85: ...NOTES...
Page 86: ...NOTES...
Page 88: ...DYNISCO INSTRUMENTS 38 FORGE PARKWAY FRANKLIN MA 02038 ATTN MARKETING DEPT Place Stamp Here...