B&R Industries X20 System, User Manual

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X20 system modules • Counter modules • X20DC4395
X20 system User's Manual 3.10 889
4.11.17.12.9.3 Configure time measurement function for the rising edge
Name:
CfO_EdgeTimeRisingMode01 to CfO_EdgeTimeRisingMode08
These registers can be used to configure the time measurement function for the rising edge of the respective
channel.
Data type Value
UINT See bit structure.
Bit structure:
Bit Description Value Information
0 Channel 1
...
0 - 3 Selects the channel for the starting edge
7 Channel 8
0 The falling edge of the channel configured in bits 0 to 3 serves
as the starting edge.
4 Selects the edge for the starting edge
1 The rising edge of the channel configured in bits 0 to 3 serves
as the starting edge.
5 - 6 Reserved -
0 Triggered
1)
7 Trigger
1 Continuous
2)
8 - 11 Previous start edge 0 to 15 The value determines which entry in the starting edge FIFO
should be used to calculate the time difference.
0 8 Mhz
1 4 Mhz
2 2 Mhz
3 1 Mhz
4 500 kHz
5 250 kHz
6 125 kHz
12 - 15 Time measurement resolution
7 625 kHz
1) The time measurement is triggered by the corresponding bit in the 4.11.17.12.9.5 "TriggerRisingCH" register.
2) Time measurement runs continuously and is triggered at every edge.
4.11.17.12.9.4 Trigger falling edge detection
Name:
TriggerFallingCH01 to TriggerFallingCH08
If bit 7 "Trigger" is cleared in the 4.11.17.12.9.2 "CfO_EdgeTimeFallingMode" register, then detection of a falling
edge on the respective input can be triggered using the respective bit in this register. After a bit has been set, the
next falling edge on the corresponding channel is detected.
Data type Value
USINT See bit structure.
Bit structure:
Bit Description Value Information
0 Falling edges on channel 1 are not detected 0 TriggerFallingCH01
1 The next falling edge on channel 1 will be detected
... ...
0 Falling edges on channel 8 are not detected 7 TriggerFallingCH08
1 The next falling edge on channel 8 will be detected
4.11.17.12.9.5 Trigger rising edge detection
Name:
TriggerRisingCH01 to TriggerRisingCH08
If the "Continued/triggered" bit is cleared in the 4.11.17.12.9.3 "CfO_EdgeTimeRisingMode" register, then detection
of a rising edge on the respective input can be triggered using the respective bit in this register. After a bit has been
set, the next rising edge on the corresponding channel is detected.
Data type Value
USINT See bit structure.
Bit structure:
Bit Description Value Information
0 Rising edges on channel 1 are not detected 0 Trigger rising edge - Channel 1
1 The next rising edge on channel 1 will be detected
... -
0 Rising edges on channel 8 are not detected 7 Trigger rising edge - Channel 8
1 The next rising edge on channel 8 will be detected