medlab EG01010 - Page 19

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Medlab medizinische Diagnosegeräte GmbH EG01010 User Manual
Version 1.06
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3 bytes are transmitted in this block.
Type == 00 → not used
Type == 10 → respiration value
Type == 01 → pulse value
Type == 11 → not used, but reserved for future extensions
The checksum is the sum of all bytes in the block, with byte 2, the chksum itself, ignored for the sum. It
includes the sync character (byte 1). Since only 7 bits are used, the result is "anded" with 0x7F.
The values are limited to a number of 0xF7, so no mix-up with sync bytes can occur.
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Byte 1
Sync
1 1 1 1 1 1 0 0
Byte 2
Chksum
0
Bit 6
Chksum
Bit 5
Chksum
Bit 4
Chksum
Bit 3
Chksum
Bit 2
Chksum
Bit 1
Chksum
Bit 0
Chksum
Byte 3
Electrode
0 Respwav MI X X X X X
Byte 4
Channels
0 X X X X III II I
Byte 5
EKGStat
0
Bit 1
Filter 2
Bit 0
Filter 2
EMG
Filter1
Bit 1
Amp
Bit 0
Amp
Bit 1
Speed
Bit 0
Speed
Byte 6
Status
0 N X X
Bit 3
S3
Bit 2
S2
Bit 1
S1
Bit 0
S0
A Status block contains six bytes:
5 bytes are transmitted in this block. „X“ means the bit is unused and undefined.
The checksum is the sum of all bytes in the block, with byte 2, the chksum itself, ignored for the sum. It
includes the sync character (byte 1). Since only 7 bits are used, the result is "anded" with 0x7F.
Electrodes, Byte 3: a „1“ in the respective bit position 0 .. 4 means this electrode is connected
Respwav: „1“ respiratory waveform sample is transmitted
„0“ respiratory waveform sample is not transmitted
MI (main interf.) „1" large 50/60 Hz interference detected
„0“ large 50/60 Hz interference is not detected
Channels, Byte 4: a „1“ in the respective bit position 0 .. 6 means this wave is transmitted
EKG Status, Byte 5: Speed: „00“ 50 wave blocks per second
„01“ 100 wave blocks per second
„10“ 150 wave blocks per second
„11“ 300 wave blocks per second