LINK Systems OmniLink 5000 User Manual
Page 7
April 17, 2000
Man ual Revisio n 1.0
1.1
Section 1
Introduction
The Tonnage Monitor module is an optional addition to the OmniLink 5000 Press Control intended to
measure and display the force being applied to the frame of a mechanical power press. The force
applied during the working portion of the stroke is compared with allowable limits based on the capacity
of the machine and correct operation of the die and material being used. Tonnages beyond these limits
cause various types of stop signals to be sent to the press control depending upon the importance of the
overload. Present tonnage readings, status messages, present tonnage limits, and detailed tonnage versus
angle graphs (signatures) can be examined or programmed through the same Operator Terminal as all
other OmniLink 5000 settings.
Section 1.1
Features
The 5000-8A Tonnage Monitor Module provides four strain connections for use on two or four
channel machines.
A crankshaft angle with a resolution of .021 degrees is supplied to the module by an internal
communication with the Press Control Logic Board. Position dependent parameters such as the
working portion of the stroke or data window settings are entered directly into the Tonnage Monitor
Module requiring no external cam switches.
The same internal communication allows the module to instruct the press control to Top Stop, Cycle
Stop, or Cycle Stop and turn Off the hydraulic overload outputs depending on the present stroking
mode and the type of tonnage alarm that has occurred.
Within the working portion of the stroke tonnage, limits for each job can be set for the maximum
allowable forward tonnage (High Limit), minimum required forward tonnage (Low Limit), and
maximum allowable reverse tonnage (Reverse Limit).
Inside the monitoring region additional data windows can be set to become active at specific
crankshaft angles, creating additional Low and High limits that become active only for the region
specified. Up to four data windows can be programmed for each job.
A maximum allowable forward tonnage limit is established when the module is installed, based on
the capacity of the machine (Machine Rating) and cannot be turned Off.
If desired, additional limits can be placed on the total tonnage that reflect the maximum allowable
tonnage at specific positions in the stroke.
Limits can be programmed manually, automatically calculated by the Tonnage Monitor Module, or
recalled along with all other OmniLink 5000 settings through the use of job setups.
Tonnage alarm counters are maintained for low, high, machine, and reverse tonnage alarms.
Status messages for each channel indicate the first alarm condition that occurred during the stroke.
Each channel can be configured with a 15 character description indicating its physical location on the