SCADAPack Transmitters

This Technical Support Notice applies to SCADASense 4102, 4202 and 4203 sensor software version 5.10 only. Version 5.10 was installed in SCADASense 4102, 4202 and 4203 sensors shipped between October 15, 2007 and November 26, 2007. The SOLARPack 410 is not affected by this issue.

Issue Description

The 4299SI sensor interface firmware used in SCADASense 4102, 4202, and 4203 sensors may incorrectly report that readings are invalid (an error flag is set in the status register) accompanied by a reading value that is invalid. The actual pressure is not incorrect. The invalid flag will last for one reading, and then the correct value without error flags will be reported.

This issue is not present on the SOLARPack 410.

Effect on RealFLO Flow Computers

RealFLO flow computers monitor the status register from SCADASense 4102, 4202, and 4203 sensors. The invalid reading is ignored and an alarm is logged in the alarm log. This may result in a number of alarms in the log, and eventually in older alarms being discarded.
The alarms generated are "Differential Pressure out of Range", "Static Pressure out of Range", "Bad Differential Pressure" or "Bad Static Pressure".

Effect on Other Programs

Devices that monitor the reading and status registers will detect invalid data when it is incorrectly reported by the transmitter. Devices that use the sensor reading without checking the status registers will experience invalid data. The status register should be monitored by any program polling a transmitter, and invalid data should be flagged and processed accordingly. There are two status registers used to flag invalid data, 40407 and 40408. These registers hold bit mapped values with individual bits corresponding to invalid data conditions. These registers are thoroughly documented in the user manuals for the SCADASense 4102, 4202, and 4203 sensors.

Versions Affected

This vulnerability is present on SCADAWave 4102, 4202, and 4203 sensors with Sensor Software Version 5.10. Version 5.10 was installed in SCADASense 4102, 4202 and 4203 sensors shipped between October 15, 2007 and November 26, 2007. The SOLARPack 410 is not affected by this issue.

Corrective Action

A new firmware release, version 5.30, is being prepared to support field upgrades.

An upgrade kit will be provided. The kit will include a hardware programmer. There are some restrictions on the upgrades.

  • Upgrading of any released version of firmware is supported.
  • Upgrading to version 5.30 and higher is supported. Upgrading to older versions (below 5.30) is not supported. Older firmware did not support field upgrades.
  • Downgrading of firmware is not supported.
  • A power loss at an inopportune time in the upgrade process may result in loss of configuration, but the unit will be functional. Reconfiguration will be required should this occur.
  • The accuracy of measurements will be at least as good as the previous version of firmware in the unit. The accuracy of measurements for field upgraded units may be less than the accuracy of factory updated units with the same firmware. In other words, new features will use default values equivalent to the previous firmware settings. Sensors will meet the stated specifications.