MOBILTEX® DATA LTD.
TITLE:
Installation and Operating Instructions
Calgary, Alberta
DOCUMENT NO.:
SPI1-MAN-001
SHEET:
39 of 57
REV:
1.14
SPI1 re-synchronizes at the top of the minute. As long as the cycle time is evenly divisible into 60s,
synchronization is assured among different manufacturers’ interrupters. Example cycle times that meet this
criteria: 100ms, 200ms, 250ms, 500ms, 1000ms, 2000ms, 3000ms, 4000ms, 5000ms, 6000ms, 10000ms, 12000ms,
15000ms, 20000ms, 30000ms, 60000ms. Also, some manufacturers start an interruption cycle at the reference
point with the rectifier on-time occurring before the rectifier off-time—in this case, set the ‘ON 1ST’ parameter
in the schedule that will be used.
When a schedule is active, i.e. interruption is in progress, the ‘MODE:’ field will show ‘SCHx’, where ‘x’ is the
identifier number of the active schedule.
Note that schedules are prioritized with the lower number schedule having higher priority. If two schedules overlap
in time, the lower numbered schedule will continue operating until the overlap ends.
4.7 De-polarization Operation
The SPI1 may be used for shutting off the rectifier output during pipeline de-polarization procedures. This operation
may be performed using manual mode, or any of the seven scheduler entries. To activate this mode, select a schedule
and set the off time equal to the cycle time. The rectifier will remain off for the time set in the duration time entry for
the selected schedule. At the end of the interruption duration period, the rectifier output will be re-activated.
4.8 SPI1Config Utility
A Mobiltex
®
provided utility, SPI1Config.exe, may be used to configure the SPI1 from a PC (must be running
Microsoft Windows 2000/XP/2003/Vista operating system and have an unused RS-232 serial port). SPI1Config
presents a graphical user interface (GUI) that simplifies the entry of parameters into the SPI1. Figure 33 shows the
main screen:
Figure 33 SPI1Config Screen Shot
