Rockwell Automation 1792-IB4/B INSTL.INST ARMORBLOCK 4 INPUT - Manual (Page 10)

ArmorBlock 4 Input Module 10
Publication 1792-5.1 – 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 4
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 S Reserved I3 I2 I1 I0
Where: I = Input
S = Sensor source voltage fault
Word Bit Description
Produces 00–03 Input bits – bit 00 corresponds to input 0, bit 01 to input 1, and
so on.
0 = input off; 1 = the input is on.
04–06 Reserved
07 Sensor source voltage fault bit – this bit is set (1) when the sensor
source voltage is faulted.