4.5 Parameter list

The table below shows the complete list of M&C parameters the DEICE-Controller knows. For each parameter the valid range and a short description are given.

General

DEICE-Controller specific

Status Deice Operation monitoring

The command 'stmd=?' returns a 6 character string which contains the operation state of the DEICE CONTROLLER, Example:

   D1a0R1
    | | |
    | | Rainblower request to be ON
    | Number of the active stages (0 to 3)
    Deice request to be ON

Status Deice Delay monitoring

The command 'stdl=?' returns a 6 character string which contains the delay state of the DEICE CONTROLLER, Example:

   D59R59
     |  |
     |  Delay time in minutes Rainblower
     Delay time in minutes Deice

Status Deice Output Type monitoring

The command 'sttp=?' returns a 15 character string which contains the type state in HEX of all deice outputs of the DEICE CONTROLLER, Example:

   D444555666308RA
    |         || |
    |         || Output Type Rainblower Output
    |         |Output Type Deice Subreflector
    |         Output Type Deice Output HB-11
    Output Type Deice Output HB-1

Status Deice Output State monitoring

The command 'stot=?' returns a 15 character string which contains the state of all deice outputs of the DEICE CONTROLLER, Example:

   D000000000000R1
    |         || |
    |         || Output State Rainblower Output
    |         |Output State Deice Subreflector
    |         Output State Deice Output HB-11
    Output State Deice Output HB-1

Status Deice Alarm State monitoring

The command 'stal=?' returns a 15 character string which contains the alarm state of all deice outputs of the DEICE CONTROLLER, Example:

   D100000000020R0
    |         || |
    |         || Output Alarm State Rainblower Output
    |         |Output Alarm State Deice Subreflector
    |         Output Alarm State Deice Output HB-11
    Output Alarm State Deice Output HB-1

Status Deice Sensor State monitoring

The command 'stsn=?' returns a 32 character string which contains the sensor state of the DEICE CONTROLLER, Example:

   D0O1A1M0S0a09.5b14.5t30.5p09.5R0
    | | | | |    |    |    |    | |
    | | | | |    |    |    |    | Rain Sensor
    | | | | |    |    |    |    Reflector Panel Temp.
    | | | | |    |    |    Reflector Chamber Top Temp.
    | | | | |    |    Reflector Chamber Bottom Temp.
    | | | | |    Ambient Temp.
    | | | | Subreflector 47°C Control Temp. Sensor
    | | | Main Reflector 40°C Alarm Temp. Sensor
    | | Ambient 4°C Release Temp. Sensor
    | Optical Snow Sensor
    Deice/Snow Sensor

Additional

• name --- description
• tmp1..4 --- r/oTemperature sensor 1..4 (deg C)
• outp --- Digital outputs
• stat --- r/oI/O state

I/O state monitoring

The command 'stat=?' returns a 32 character string which contains the complete I/O state of the DEICE-Controller, coded in 4 hexadecimal numbers. Example:

   000000000010 00000400 00 00
             |       |   |  |
             |       |   |  no hi temperature faults
             |       |   no low temperature faults
             |       Output 11 is ON
             Input 5 is on

• Inputs --- The first number (12 characters, 48 bits) reports the state of the DEICE-Controller input circuits. Each bit of the hexadecimal number corresponds to one input. The least significant bit corresponds to input 1. A bit set to '1' reports an 'ON' or 'FLT' input, inputs which are 'OK' or 'OFF' read '0'. The reported port states are logical states; they already include the polarity inversion and filtering delay as defined in the setup for each individual port. Unused ports always read '0'.
• Outputs --- The second number (8 characters, 32 bits) reports the actual state of the output ports in a similar way. The contents of this are exactly the same as the reply to 'outp=?': pit 0 corresponds to the state of PhotoMOS output 1, bit 15 to the state of the relay 6. A bit set to 1 tells that the output is 'ON' as displayed at the user interface. A software polling the 'stat=?' variable frequently may parse the output state from here rather from 'outp=?', thus saving some protocol overhead.
• Temperature Faults --- The words 4 (low temperature faults) and 5 (high temperature faults) encode the limit faults for the temperature sensors of the DEICE-Controller. The least significant bit corresponds to the internal board temperature sensor, bit 1 to the external temperature sensor 1 and so on.

Output control

The command 'outp=?' returns an 8 digit, 32 bit hexadecimal number showing the actual state of all outputs of the DEICE-Controller. Bit 0 corresponds to the state of PhotoMOS output 1, bit 15 to the state of the relay 6. A bit set to 1 tells that the output is 'ON' as displayed at the user interface.

Writing a 'outp=xxxxxxxx' sets all outputs of the DEICE-Controller. To set or clear a single output, you have to read the actual state, set/clear the appropriate bit and send the number back to the DEICE-Controller.

Outputs which are not configured as type 'OUTPUT' always read '0'. Setting these outputs has no effect; the DEICE-Controller silently ignores commands to outputs which are not configured to act as a general purpose output.