Through a scheme of command and residual priorities that tests the sender's priority before command output, R7044 command control eliminates the contention that can occur for control of a point. Normally, command control honors point minimum ON or OFF times so as to avoid the motor damage that can occur from too rapid cycling. Operators display, command, log, and acknowledge alarms from pseudopoints as they would any physical point. Floating alarm limits follow DDC setpoints so that as the setpoints change, alarm limits change. Software adjusts alarm limits in response to new conditions to avoid alarms that do not reflect true alarm conditions.
Independent messages track each set.
The R7044 and M-Cels perform their normal control and monitoring functions. Operators can also make changes via the peer bus or dialup link without any direct contact with the R7044. The central processor can dial directly into the remote R7044 when operators or programs at the central need data from it. A user-specified data file in the R7044 determines which point alarms or alarm priorities should cause immediate dialup to the central. The remote R7044 performs its usual functions, including EMS, DDC, and communication with an optional subsystem of M-Cels.