Rockwell Automation 1798-IB4 FlexArmor User Manual - Manual (Page 20)

Publication 1798-UM001B-EN-P - November 2002
2-6 How Communication Takes Place and I/O Image Table Mapping
Input Delay Times for the 1798-IB4 Input Module
Description of 1798-IB4D Image Table Mapping
Memory Map of 4 Point Discrete Input Module Image Table - 1798-IB4D
Bits Description Selected Delay Time
02 01 00 Delay Time for Inputs 00-03
0 0 0 Delay Time 0 (default) 256µs
0 0 1 Delay Time 1 512µs
0 1 0 Delay Time 2 1ms
0 1 1 Delay Time 3 2ms
1 0 0 Delay Time 4 4ms
1 0 1 Delay Time 5 8ms
1 1 0 Delay Time 6 16ms
1 1 1 Delay Time 7 32ms
I/O Image
Input Size
Module Image
1 or 2 Words
0 or 1 Word
Read
Write
Output Size
Inputs
Delay
Time
Not used
Reserved
Open Wire
Disables
Reserved
Short Circuit
Detect
43388
Open Wire
Detect
Not Used
Decimal
Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Size
Octal Bit 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Dec
S3 S2 S1 S0 W3 W2 W1 W0 Not Used I3 I2 I1 I0 Read Word 1
Not Used Read Word 2
Reserved D3 D2 D1 D0 Reserved DT 00-3 Write Word 1
Where I = Input Data (I0 corresponds to input 0, I1 corresponds to input 1, etc.); DT = Input Delay Time (DT 00-3
corresponds to inputs 0 through 3) W = Open Wire Detect; S = Short Circuit Detect; D = Open Wire Disable