Output Description

DONE

Data_Type	Default_Value	Range	Unit
BOOL	-	-	-

DONE indicates the processing state of the function block. After completion or abortion of processing due to an error, DONE is set to TRUE for one cycle. This output always has to be considered together with output ERR. If ERR is TRUE, an error occurred. In this case, the error number can be read at output ERNO.

ERR (error)

Data_Type	Default_Value	Range	Unit
BOOL	-	-	-

ERR indicates whether an error occurred during the processing of the function block. This output always has to be considered together with output DONE. If DONE is TRUE and ERR is TRUE, an error occurred. In this case, the error number can be read at output ERNO.

ERNO (error \ number)

Data_Type	Default_Value	Range	Unit
WORD	-	-	-

ERNO provides an error identifier if an invalid value has been applied to an input or if an error occurred during job processing. ERNO has to be considered together with the outputs DONE and ERR. The value output at ERNO is only valid if DONE is TRUE and ERR is TRUE Error Messages of the Function Block Libraries.

MODE

Data_Type	Default_Value	Range	Unit
BYTE	-	-	-

Output displays the actual operating mode of the device.

Parameter	Value	Operating mode
DC541_MODE_IO	= 16#11 = 17	IO device (IO mode)
DC541_MODE_COUNT	= 16#22 = 34	Counting device (counter mode)

CYCLE (cycle \ time)

Data_Type	Default_Value	Range	Unit
WORD	-	-	µs

Output displays the cycle time of the device. The cycle time is set during the device configuration and can have the following values depending on the channel configuration:

Parameter		Value
IO device			50 µs
Counting device		1-2 functions	50 µs
		3-4 functions	100 µs
		5-8 functions	200 µs
“Functions”
	PWM	Pulse-width modulator
	FREQ	Time and frequency measurement
	FREQ_OUT	Frequency output
	32BIT_CNT	32 bit encoder
	FWD_CNT	32 bit count-up counter
	LIMIT	Limit value monitoring for the 32 bit counter

CFG0…CFG7 (configuration \ of C0…C7)

Data_Type	Default_Value	Range	Unit
BYTE	-	-	-

The outputs display the current channel configuration of the channels C0…C7.

MODE = DC541_MODE_IO = 16#11 = 17

CFGx	Channel	Function
0	0…7	Normal input
1	0…7	Normal output
255	0…7	Interrupt input

MODE = DC541_MODE_COUNT = 16#22 = 34

CFGx	Channel	Function
0	0…7	Normal input
1	0…7	Normal output
2	0…7	Pulse-width modulator (PWM)
3	0…1	50 kHz count-up counter (FWD_CNT)
3	2…7	5 kHz count-up counter (FWD_CNT)
4	0…7	Time and frequency measurement (FREQ)
5	4…7	Limit values for 32 bit counter (LIMIT)
6	0	Bidirectional 32 bit counter (uses channels 0…3). The channels CFG1…CFG3 can be set as desired.
7	0…7	Frequency output