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Page 3 - Generating Set Status Information



Notes:

1. These are read only registers.

2. A unique manufacturer code is assigned to each manufacturer.

3. The meaning of the model number is manufacturer specific, e.g. two manufacturers may have a model 100.

4. The manufacturer code and model number must be used together to identify a particular product unambiguously.

5. The meaning of the control mode is shown in the table below.

6. The shutdown flag on a control unit indicates that one or more of the alarm codes has been set to ‘shutdown alarm’, it will clear automatically when no alarm codes are set to shutdown alarm. A system control function is used to clear shutdown alarms. In some situations it may not be possible to set one of the alarm codes to indicate the type of shutdown alarm because the type is not known, in this case only the shutdown flag will be set and the master should consider it an undefined shutdown alarm.

7. The shutdown alarm flag on a hub indicate that state of the hub itself, not the state of any satellite. The state of a satellite must be read from the satellite itself.

8. The electrical trip and warning alarm flags operate in the same way as the shutdown alarm flag but for the corresponding alarm codes.

9. The telemetry alarm flag on a control unit is set when the control unit decides that a dial-out is required, the logic behind this is product specific. It can only be cleared by a system control function.

10. The telemetry alarm flag on a hub is only set if the hub itself has a problem, and can only be cleared by a system control function. It is edge triggered i.e. once it is cleared it will not be set unless the internal error is cleared and then happens again. An example of a situation that will set this flag is if the hub loses communication with a satellite.

11. The satellite telemetry alarm flag is the OR of all the satellite telemetry alarm flags in the ‘telemetry status and configuration’ page and indicates that one or more satellites requires servicing.

12. Whenever the telemetry alarm flag (or one of the satellite telemetry alarm flags in the case of a hub) is set it will cause continual dial outs if a modem is fitted and dial out is enabled.

13. The meaning of the state machine status is described in the table below.

14. The string checksum is the sum of every character in every fixed string in the slave device, it is used to detect the substitution of a slave device that differs only in its strings and thus check the validity of any copies of these strings held by a master. This number must not change during the normal operation of the slave device. The exact method of calculating the checksum must not be assumed and it must not be compared with a checksum generated my a master, it must only be compared with a previously read checksum to determine change.

15. The state machine state (registers 18-25) indicate the current state of each state machine, the conversion between state code and string is specific to each model and not covered in this document, refer to DSE for documentation.

 



Registers

Register offset Name Minimum value Maximum value Scaling factor Units Bits/ sign
0 Manufacturer code 0 65534 1   16
1 Model number 0 65534 1   16
2-3 Serial number 0 999999999 1   32
4 Control mode 0 65535 1   16
5 Control mode selection (330/331/334/335) 0 65535 1   16
6 Control unit not configured No Yes     16/16
  Unimplemented 0 0     15/16
  Control unit failure No Yes     14/16
  Shutdown alarm active No Yes     13/16
  Electrical trip alarm active No Yes     12/16
  Warning alarm active No Yes     11/16
  Telemetry alarm flag Not active Active     10/16
  Satellite telemetry alarm flag Not active Active     9/16
  No font file No Yes     8/16
  Unimplemented 0 0     1/16-7/16
7 S.M. 1 status 0 3     16/16-15/16
  S.M. 2 status 0 3     14/16-13/16
  S.M. 3 status 0 3     12/16-11/16
  S.M. 4 status 0 3     10/16-9/16
  S.M. 5 status 0 3     8/16-7/16
  S.M. 6 status 0 3     6/16-5/16
  S.M. 7 status 0 3     4/16-3/16
  S.M. 8 status 0 3     2/16-1/16
8-9 String checksum 0 0xFFFFFFFF     32
10 S.M. 1 timer 0 65534 1 Seconds 16
11 S.M. 2 timer 0 65534 1 Seconds 16
12 S.M. 3 timer 0 65534 1 Seconds 16
13 S.M. 4 timer 0 65534 1 Seconds 16
14 S.M. 5 timer 0 65534 1 Seconds 16
15 S.M. 6 timer 0 65534 1 Seconds 16
16 S.M. 7 timer 0 65534 1 Seconds 16
17 S.M. 8 timer 0 65534 1 Seconds 16
18 S.M. 1 state 0 65535 1   16
19 S.M. 2 state 0 65535 1   16
20 S.M. 3 state 0 65535 1   16
21 S.M. 4 state 0 65535 1   16
22 S.M. 5 state 0 65535 1   16
23 S.M. 6 state 0 65535 1   16
24 S.M. 7 state 0 65535 1   16
25 S.M. 8 state 0 65535 1   16
26 Change in event log contents No Yes      
27-255 Reserved          

 

Control modes

Mode Description
0 Stop mode
1 Auto mode
2 Manual mode
3 Test on load mode
4 Auto with manual restore mode/Prohibit Return
5 User configuration mode
6 Test off load mode
7-65534 Reserved
65535 Unimplemented

Notes on control modes:

1. ‘Stop mode’ means stop the engine (generator) and in the case of ‘automatic mains failure units’ transfer the load to the mains if possible.

2. ‘Auto mode’ means automatically start the engine (generator) in the event of a remote start signal or a mains-failure, and in the case of ‘automatic mains failure units’ transfer the load to the generator when available. When the remote start signal is removed or the mains returns, stop the engine (generator) and in the case of ‘automatic mains failure units’ transfer the load back to the mains.

3. ‘Manual mode’ means start the engine (generator) With some control units it will also be necessary to press the start button before such a manual start is initiated. In the case of ‘automatic mains failure units’ do not transfer the load to the generator unless the mains fails.

4. ‘Test on load mode’ means start the engine (generator) With some control units it will also be necessary to press the start button before such a manual start is initiated. Transfer the load to the generator when it is available, regardless of the mains condition. This mode is only provided on automatic mains failure units.

5. ‘Auto with manual restore mode’ means the same as 2 above but when the remote start signal is removed or the mains returns, the engine (generator) will not stop and the load will not be transferred back to the mains. This mode is only provided on automatic mains failure units.



6. ‘User configuration mode’ means that the unit is being configured from its user interface and is not available for normal operation, there is no method of entering or leaving this mode by telemetry, it must be done from the user interface.

7. Any control unit that does not have a control mode will return the unimplemented value.

8. Register 5 is used to select control modes for use with SCADA mimic screens on modules that have a single mode button (currently 330/331/334/335) in conjunction with page 16. System control code 35714 causes this value to scroll though the available control mode values. System control code 35715 causes the selected control mode to be applied. If neither of these two control modes are received for a period of two minutes then the value will revert to the value stored in register 4.

9. ‘Test off load mode’ means start the engine (generator/S2). The load will not be transferred to S2.

 

 

State machine status

Status Description
0 Implemented but not changed since last read of state string
1 Implemented and changed since last read of state string
2 Reserved
3 Unimplemented

Notes on state machine status:

1. A state machine that is implemented (status 0 or 1) has a fixed name string in page 27 that can be used in a status display, the name strings for unimplemented state machines will contain 32 spaces (Unicode 0x0020).

2. A state machine that is implemented has a state string in page 28 which may be used in a status display. The contents of this string will change when the state machine changes state and this is indicated by the status changing from 0 to 1, when the state string is read the status will change back from 1 to 0. This means that the string only has to be read when there is a change in state, thus minimising the volume of traffic.

 

State machine states

State Description
0-65534 Reserved
65535 Unimplemented

 







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