Gemini 4100 Instruction Manual page 16

CODE 56 - COUNTER (B) RESET MODES
The Gemini 4000 has six different counter reset modes. There are also two
methods by which manual reset can act on the counter (reset must be enabled, see
function code 66 and dip switch set-up). The first is a "maintained" reset action,
where the unit is held at reset for as long as the reset terminal or reset button is
activated. The second is a "momentary" reset, in which the unit resets, when reset
is activated, and starts counting even though the terminal or reset button may still
be active. A "-" sign in front of the mode identifier indicates "momentary" reset
action, the absence of the "-" sign indicates "maintained" reset action.
For the Gemini 4200, if both outputs are assigned to the Rate Channel [51 3],
or the Output 2 Termination mode is boundary [54 6], the only Counter (B) Reset
mode that is available is Reset to Zero [56 1].
In Reset to Zero modes the Output (if assigned to Counter B) activates at the
Preset Value. In Reset to Preset modes the Output activates at zero.
In the "Reset to Preset" modes, for proper operation, the counter normally
counts down. In the "Count with Inhibit" and "Separate Inputs" input response
modes, [43 1 or 4], the unit will automatically count down if a Reset to Preset
mode is selected. In the other input response modes, proper input phasing is
required for down counting. See "CODE 43 - INPUTS 1 & 2 RESPONSE
MODES" section for more details.
Note: The Reset Button & Terminal Actuation Mode must be programmed to
mode [42 2 or 3] in order to be able to manually reset the Counter (B). The
activation and de-activation response time for reset is 10 msec.
Note: For the Gemini 4200, all reset to preset modes reset to preset 2 and Timed
Output refers to Output 2.
[56 1] MANUAL RESET TO ZERO (RTZ) - Manual reset to zero is
accomplished by pulling the "RST." terminal to "COMMON" or, if the front
panel reset is enabled, by pressing the front panel reset button. Reset is
"maintained".
[56 2] MANUAL RESET TO PRESET (RTP) - Manual reset to Preset is
accomplished by pulling the "RST." terminal to "COMMON" or, if the front
panel reset is enabled, by pressing the front panel reset button. Reset is
"maintained".
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[56 3] AUTOMATIC RESET TO ZERO AFTER TIMED OUTPUT - The
counter automatically resets to zero when Timed Output ends. Manual reset
is "maintained" and will override automatic reset. The "Output Termination
Mode" should be programmed for timed output operation, [54 5], when in
this mode.
[56 4] AUTOMATIC RESET TO PRESET AFTER TIMED OUTPUT - The
counter automatically resets to Preset when Timed Output ends. Manual reset
is "maintained" and will override automatic reset.
The "Output Termination Mode" should be programmed for timed output
operation, [54 5], when in this mode.
[56 5] AUTOMATIC RESET TO ZERO AT BEGINNING OF TIMED
OUTPUT (AT PRESET) - In this reset mode, the counter will automatically
reset to zero at the beginning of Timed Output (at Preset). The Timed Output
Value must be shorter than the time required for the counter to count to the
Preset Value, otherwise, the Output will appear to be latched on. Manual reset
is "maintained" and will override automatic reset. The "Output Termination
Mode" should be programmed for timed output operation, [54 5], when in
this mode.
[56 6] AUTOMATIC RESET TO PRESET AT BEGINNING OF TIMED
OUTPUT (AT ZERO) - In this reset mode, the counter will automatically reset
to Preset at the beginning of Timed Output (at zero). The Timed Output Value
must be shorter than the time required for the counter to count to zero,
otherwise, the Output will appear to be latched on. Manual reset is
"maintained" and will override automatic reset. The "Output Termination
Mode" should be programmed for timed output operation, [54 5], when in
this mode.
[56 -1]
[56 -2]
[56 -3] These modes are the same as above with the exception
[56 -4] that manual reset is set for "momentary" operation.
[56 -5]
[56 -6]