LINK Systems 5100-8 Tonnage & Analog Signal Monitor - Manual (Page 26)

Doc #: L-802-1110 Page 24 Rev. 02
3.2.5.5 Reverse Rating Alarm
A Channel Status message "Reverse Rating" indicates that the maximum reverse tonnage recorded
during the last stroke exceeded the reverse channel rating as set by the “Max Reverse Setpoint Level”
(see section 4.4.5 on page 45 for details). When this condition is detected on any channel, a Top Stop is
issued.
3.2.5.6 Total Alarm/Stop Condition
This alarm condition indicates that the maximum total tonnage exceeded the capacity of the machine at
the height in the stroke at which it occurred. It is the only limit applied to the total tonnage and may or
may not coincide with any channel alarm. When the condition is detected on the total tonnage, a Cycle
Stop is issued.
This alarm will only occur if the tonnage monitor is configured to de-rate the total tonnage capacity.
The machine rating is specified by the press manufacturer at a specific height off the bottom of the
stroke (for example .25 inches). Above this height the total tonnage available is limited by the torque of
the crankshaft and will decrease as the height off the bottom at which the tonnage occurs increases (see
section 4.6 on page 48 for how this de-rate curve is programmed).
3.2.5.7 Resetting Tonnage Alarms
When a tonnage alarm occurs, the tonnage monitor will issue a stop (the type of stop depends on the
alarm type and configuration). This stop will remain in effect and further stroking prevented until the
alarm is reset by pressing the RESET FAULT softkey in the main tonnage monitor screen.
WARNING: Tonnage alarms can generate a stop before the bottom of the stroke.
When the RESET FAULT softkey is pressed, the tonnage monitor is
effectively BYPASSED until the top of the stroke. Make sure to clear
the fault condition before reengaging the press.
3.2.6 Error Conditions
A number of error conditions can be reported by the tonnage monitor. Some of these conditions are
reported in the “Module Status” area (see “a” in Figure 5) and some are reported for a particular channel
in the channel status area (see “b” in Figure 5).
3.2.6.1 Module Error Messages
The following is a list of errors that can appear in the “Module Status” area:
“Boot Info Corrupt”
The boot information block failed its’ validity check. If this is not cleared by
turning the unit off and back on, then the unit needs to be sent to Link for
repair.