Allen-Bradley FLEX I/O 1794-IP4, Руководство пользователя, Страница: 50 / 70

5–6 How Communication Takes Place and I/O Image Table Mapping with the DeviceNet Adapter
Publication 1794-6.5.16 – September 1998
Definition Bit Word
Write
Wor 2
Bit 04 Clock frequency for period time measurement – Channel 1 – refer to bit 00.
Word 2
(Cont.)
Bits 05–07 Selection of Number of periods for measurement – Channel 1 – see bits 01–03 above
(Cont.)
Bit 08 (10) Clock frequency for period time measurement – Channel 2 – refer to bit 00.
Bits 09–11
(11–13)
Selection of Number of periods for measurement – Channel 2 – see bits 01–03 above
Bit 12 (14) Clock frequency for period time measurement – Channel 1 – refer to bit 00.
Bits 13–15
(15–17)
Selection of Number of periods for measurement – Channel 1 – see bits 01–03 above
Write
Wor 3
Bit 00 Start new measurement bit – Channel 0 – when set, start new measurement on positive edge
Word 3
Bit 01 Start new measurement bit – Channel 1 – when set, start new measurement on positive edge
Bit 02 Start new measurement bit – Channel 2 – when set, start new measurement on positive edge
Bit 03 Start new measurement bit – Channel 3 – when set, start new measurement on positive edge
Bit 04–15
(04–17)
Reserved
Write
Words 4
and 5
Bit 04–15
(04–17)
Reserved