Instron 4400 Series Operator's Manual page 63

Table 4-1. Main Panel Functions (continued)
CONTROL or
INDICATOR
LOAD Fault indicator that lights when a load overrange (102%
or greater of load cell maximum capacity) occurs. The
crosshead stops and the indicator flashes until the
overload is cleared by pressing the UP or DOWN key or
a JOG key on the load frame, whichever direction
decreases the measured load.
TRAVEL Fault indicator that lights when the overtravel limits for
the moving crosshead are actuated. The crosshead is
stopped when this indicator is lit.
MOTOR Fault indicator that functions as described below. This
indicator is lit steadily for the following conditions:
1. Motor drive enabling sequence (5 sec. duration).
2. Motor drive cannot be enabled.
3. Load frame cannot be identified.
4. Load frame power supply failure.
5. Crosshead second level travel limit tripped.
6. Emergency stop switch tripped.
This indicator flashes for the following conditions:
1. Drive motor overheats.
2. Drive loop failure (stall, etc.)
The MOTOR status indicator will remain on (steady or
flashing) after the condition/fault is cleared, except after the
5-sec motor drive enable sequence. Perform the key
sequence [S1] [1] [ENTER] to restore the indicator to
standby (off) condition.
TIMER Fault indicator that lights when the CPU malfunctions and a
special circuit shuts off the crosshead drive motor. Usually,
momentarily shutting down the system power clears this
condition. This LED also lights if the +/- 15 Vd.c. console
power supply fails.
Function Of Controls
FUNCTION
4-7