Siemens SIMATIC TI505 Service Manual Page 54

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Understanding Module Operation
3-2
High Speed Counter Encoder Module User Manual
3.1 Module I/O Map
The
HSCE module communicates with the PLC using word inputs and word
outputs. The PLC reads current count values, holding registers, and module
status bits from word inputs. W
ord outputs contain user
-defined counter
configuration setups and preset values.
T
able 3-1 lists the definitions for the word inputs (WX) and the word
outputs (WY), relative to a starting address of 1. If you assign a different
starting address for your I/O configuration, then all the address numbers
are relative to that starting address. For example, if you assign 9 as the
starting address, then WX1 through WX18 in the table become WX9
through WX26, and WY19 through WY32 become WY27 through WY40.
T
able 3-1
I/O Configuration T
able
Word Description Counter
WX1
WX2
WX3
WX4
Current count value, high word
Current count value, low word
Current count value, word
Current count value, word
Counter 1
Counter 1
Counter 2
Counter 3
WX5
WX6
WX7
WX8
Current count value, high word
Current count value, low word
Current count value, word
Current count value, word
Counter 4
Counter 4
Counter 5
Counter 6
WX9
WX10
WX11
WX12
Holding Register 1, high word
Holding Register 1, low word
Holding Register 2, high word
Holding Register 2, low word
Counter 1
WX13
WX14
WX15
WX16
Holding Register 3, high word
Holding Register 3, low word
Holding Register 4, high word
Holding Register 4, low word
Counter 4
WX17
WX18
Module STATUS, high word
Module STATUS, low word
(See T
able 3-6)
WY19
WY20
SETUP Word, high word
SETUP Word, low word
(See T
able 3-8 and
T
able 3-9)
WY21
WY22
WY23
WY24
Preset 1, high word
Preset 1, low word
Preset 2, high word
Preset 2, low word
Counter 1
WY25
WY26
Preset 3, word
Preset 4, word
Counter 2
Counter 3
WY27
WY28
WY29
WY30
Preset 5, high word
Preset 5, low word
Preset 6, high word
Preset 6, low word
Counter 4
WY31
WY32
Preset 7, word
Preset 8, word
Counter 5
Counter 6
PLC-to-Module
Communications
Overview
I/O
W
ord
Definitions
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