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100mm GRAPHICS RECORDER TECHNICAL MANUAL
HA249875
Issue 1 Jan 99
Section 1
Page 1 - 12
1.3.2 RECORDER FUNCTIONS (Cont.)
TOTALISERS/COUNTERS/TIMERS (TCT) OPTION
This option supplies six each of totalisers, counters and timers.
TOTALISERS
Each totaliser integrates a given input in order to derive, for example, total flow, from a flow rate input. High and
low cutoffs can be defined, and each totaliser can be configured to count either up or down. A threshold can be set
up to initiate jobs in the same way as for channel alarms. Providing access is permitted, the operator can view and
can preset totalisers without password entry.
If the 'Event input' option is also fitted, each totaliser can count pulses (max 6 Hz) which it does by counting edges
and dividing by two.
COUNTERS
Each counter can be incremented or decremented as a result of job action. Provided access is permitted, the operator
may preset the value of each counter. A threshold can be set up to initiate jobs in the same way as for channel alarms.
TIMERS
Each timer can be configured to start at a specific time and date relative to the real-time clock in the recorder. Once
initiated, the timer will run for a configurable time period (duration) and repeat at a configurable rate. Once initiated,
the timer will restart every repeat period until it is disabled. Each timer can have up to two jobs assigned to it, and
these jobs remain active for the timer Duration Period.
OPERATOR ACCESS PERMISSION
Access to all Configuration menus, and access to some Operator menus are initially password protected. It is possi-
ble to enable / disable operator access to the following functions, as described in the Installation and Operation
Manual.
Alarm setpoint adjustment
Operator message edit/print
Log initiation
Memory card status / directory display
Save / Restore configuration to/from memory card
Archive interval selection
Memory card on-off-line selection
Derived channel control
Counter pre-setting; edit preset
Timer control
Totaliser presetting; edit preset
Modem operations are protected under a second password as described in the options manual.
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