551 216 01

LED channel

Registers in LED channel:

RegNo	Identifier	Memory type	Read Out	Type
0	State	RAM Read Write	Binary	Boolean
1	ActualState	RAM Read only	Binary	Boolean
2	EnableDutyCycle	RAM Init EEPROM	Binary	Boolean
3	Intensity	RAM Init EEPROM	Decimal	Byte
4	OnPreset	RAM Init EEPROM	Decimal	Byte
5	PTPreset	RAM Init EEPROM	Decimal	Real
6
7
8
9
10
11
12
13
14	Guid	PROM Read only	-------	String
15	ChError	RAM Read Write	Binary	Record

RegNo 0: State

State:

Boolean;

When State is set to True, the LED output will be ON.

After a power-up or a reset of the module, State will be set to False.

RegNo 1: ActualState

ActualState:

Boolean;

This register holds the actual state of the LED.

RegNo 2: EnableDutyCycle

EnableDutyCycle:

Boolean;

If the EnableDutyCycle flag is set to True, the Duty-Cycle mode is enabled.

The On time is specified in LED.OnPreset and the total period in LED.PTPreset.

Enabling and disabling duty-cycle mode for a LED can be performed without affecting the setting in LED.State. This provides the option of changing the mode for a LED from simple On/Off to duty-cycle mode, and in the case where the duty-cycle mode is disabled again, the LED will return back to the state defined in LED.State.

RegNo 3: Intensity

Intensity:

Byte;

The LED intensity can be controlled by this register (0-127). Default value: 127.        

The value 0 will turn off the LED and the value 127 will set the LED to illuminate with the highest intensity.

RegNo 4: OnPreset

OnPreset:

Byte;

OnPreset: [%]

This variable holds the On time in % of PTPreset time.

The default value is 50 corresponding to 50 HZ Duty-Cycle.

RegNo 5: PTPreset

PTPreset:

Real;

This variable holds the period time for the LED. Default value: 1.0 second.

The default settings for OnPreset and PTPreset will provide a 50% Duty-Cycle output for the LED with a frequency of 1 Hz.

RegNo 14: Guid

Each channel type in an interface device consists of a unique Guid.

Guid:

String[22];

(*"xxxxxxxxxxxxxxxxxxxxxx"*)

RegNo 15: ChError

Record
	His:	Bit8;
	Act:	Bit8;
End;

There are two sets of error bits, actual and historical. The actual error bits reflect the current situation and will automatically follow any change.

The historical error bits reflect past situations and have the job of holding sporadic errors. The historical error bits are set together with the corresponding actual bits. They remain set after a read, so each individual bit must be cleared by setting it to FALSE. Only the bits where the corresponding actual bit is FALSE can be cleared.

The “His data error” bit in the P-NET response is set if any historical bit is TRUE.

The “Act data error” bit in the P-NET response reflects the validity of the data in the response. Overload, electrical error or an error in other registers involved in calculating the result gives “Act data error”.

7	0
		0: Program_storage_fault
		1: RAM_storage_fault
		2: InternalReset
		3: ExternalReset
		4: EEPROM_error_in_State
		5: EEPROM_error_in_ EnableDutyCycle
		6: EEPROM_error_in_Intensity_PTPreset_OnPreset
		7: Not Used

Bit 0	Program_storage_fault is set TRUE if the self-test finds an error in the program memory.
Bit 1	RAM_storage_fault is set TRUE if the self-test finds an error in the data memory (RAM).
Bit 2	InternalReset is set TRUE if a reset is caused by a power failure, or if the power has been disconnected (only a His error).
Bit 3	ExternalReset is set TRUE if a reset is caused by writing 255 to Reset, via P‑NET (only a His error).
The following bits are set TRUE if the self-test finds an error in the data memory (EEPROM) for the variable. EEPROM fault is only set at power-up. If the corresponding variable is accessed, Act error in the P-NET response is set. This error can occur if the power disappears when writing to EEPROM, so a rewrite to the variable could possibly solve the problem.
Bit 4	EEPROM_error_in_State
Bit 5	EEPROM_error_in_ EnableDutyCycle
Bit 6	EEPROM_error_in_Intensity_PTPreset_OnPreset
Bit 7	Not used