B&R Industries X20 System, User Manual

Page: 699 / 2720

X20 system modules • Counter modules • X20DC1198
X20 system User's Manual 3.10 699
4.11.6.9.3 SSI encoder configuration register
4.11.6.9.3.1 Standard configuration
Name:
ConfigOutput14
This configuration register is used to set the coding, the clock rate and the number of bits. Default = 0. This must
be set once using an acyclic write command.
Data type Value
UINT See bit structure.
Bit structure:
Bit Name Value Information
0 - 5 SSI value valid bits x
00 1 MHz
01 500 kHz
10 250 kHz
6 - 7 Clock rate
11 125 kHz
8 - 13 SSI number of bits x Number of bits including leading zeros
14 Reserved 0
0
Binary coding 15 Keying
1 Gray coding
4.11.6.9.3.2 Extended configuration
Name:
ConfigAdvanced
This configuration register is used to set the coding, the clock rate, the number of bits and the monostable multivi-
brator settings. Default = 0. This must be set once using an acyclic write command.
It only differs from ConfigOutput14 by data length and additional monostable multivibrator testing.
Data type Value
UDINT See bit structure.
Bit structure:
Bit Name Value Information
0 - 5 SSI value valid bits x
00 1 MHz
01 500 kHz
10 250 kHz
6 - 7 Clock rate
11 125 kHz
8 - 13 SSI number of bits x Number of bits including leading zeros
14 Reserved 0
0
Binary coding 15 Keying
1 Gray coding
00 Check OFF, no additional clock bit
01 Check set to High level
10 Check set to Low level
16 - 17 Monostable multivibrator testing
11 Level is clocked but ignored
18 - 31 Reserved 0 Reserved
Transfer to synchronous serial interface
Clock
Data
Bit n Bit n - 1 Bit n - 3 Bit 1 Bit 0
1 2 3 4
Measurement value processing
1 Starting bit ... Stores the measurement value
2 Output of first data bit
3 All data bits are transferred, monostable multivibrator time starts counting down.
4 Monostable multivibrator returns to its initial state. A new transfer can be started.