
2–60 How Communication Takes Place and I/O Image Table Mapping
)!($# , $*"&
Pulse Counter Module (1794ĆIP4) Image Table Mapping
Module Image
I/O Image
Input Size
Output Size
($ $&'
($ $&'
Counter 00 - 16-bit period measurement or low word of 32Ćbit period measurement for channel 0
Code for identification of software version
Control Word0-Setsthemeasure function
Control Word2-setsthestart of a new measurement
Control Word1-Setstheclock frequency and period multiple
Counter 01 - pulse counter for channel 0 or high word of 32Ćbit period measurement
Counter 10 - 16-bit period measurement or low word of 32Ćbit period measurement for channel 1
Counter 11 - pulse counter for channel 1 or high word of 32Ćbit period measurement
Counter 20 - 16-bit period measurement or low word of 32Ćbit period measurement for channel 2
Counter 21 - pulse counter for channel 2 or high word of 32Ćbit period measurement
Counter 30 - 16-bit period measurement or low word of 32Ćbit period measurement for channel 3
Counter 31 - pulse counter for channel 3 or high word of 32Ćbit period measurement
Readback of Control word 2 or
Reserved M0M1M2M3
Reserved
Reserved
RD0RD1RD2RD3
Block Transfer Word Assignments for the Pulse Counter Module
(1794-IP4)
(Octal Bit⇒) 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00
Dec. Bit ⇒ 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Word⇓ Read
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$ $#(&$! $&
'&*
*'$# & '$(+& *&'$# $
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