Allen-Bradley 1792-IB16 Series B, Руководство по установке, Страница: 10 / 40

ArmorBlock 16 Input Module 10
Publication 1792-5.3 – October 1996
Communicate with Your ArmorBlock Module
This ArmorBlock module acts as a slave in a master/slave environment.
It is both a “polled device” and a “change of state device.”
When configured as a polled device, a master initiates communication
by sending its polled I/O message to the ArmorBlock module. The 16
input module scans the inputs and fault bit producing a response that
reflects their status.
When configured as a “change of state” device, productions occur
when an input changes or an input source voltage fault occurs. If
neither has occurred within the “expected packet rate,” a heartbeat
production occurs. This heartbeat production tells the scanner module
that the ArmorBlock module is alive and ready to communicate.
Bit 07 06 05 04 03 02 01 00
Produces 1 I7 I6 I5 I4 I3 I2 I1 I0
Produces 2 I15 I14 I13 I12 I11 I10 I9 I8
Produces 3 S Reserved
Where: I = Input
S = Sensor source voltage fault
Word Bit Description
Produces
1
00–07 Input bits – bit 00 corresponds to input 0, bit 01 to input 1, and
so on.
0 = input off; 1 = the input is on.
Produces
2
00–07 Input bits – bit 00 corresponds to input 8, bit 01 to input 9, and so
on.
0 = input off; 1 = the input is on.
Produces 00–06 Reserved
3
07 Sensor source voltage fault bit – this bit is set (1) when the sensor
source voltage is faulted.