Rockwell Automation Allen-Bradley Compact 5000 Series - Page 63

Rockwell Automation Publication 5069-UM003B-EN-P - January 2020 63
Compact 5000 I/O Serial Module Features Chapter 3
Figure 19 - Radio Communication
Figure 20 - Read or Write Requests via DF1 Radio Modem
Modem
Message (via MSG instruction) sent to a
specific station (station 1)
Modem Station1Station2
Station 1 sends reply message.
Data Table
Reply packet received
return data
• Ladder logic triggers MSG
• DF1 driver formats command packet
Reply timeout received
Return error indication
• Send command packet
• Start reply timer
• Wait for reply (or timeout)