Bradley Smoker PLC-5 user manual Monitoring the Status of the Supervisory Controller

7-18Communicating with a PLC-5 Adapter Channel

When this Bit(s)	Is	It Indicates
10 octal (8 decimal)	0	adapter-mode controller is in run mode
and
15 octal (13 decimal)
10 octal (8 decimal)	1	adapter-mode controller is in program or test mode
and
15 octal (13 decimal)

Write ladder logic in the supervisory controller to monitor the rack-fault bits for the rack that the adapter-mode controller channel is emulating to determine the status of the remote I/O link.

Monitoring the Status of the Supervisory Controller

The adapter-mode controller channel reserves bits 10-17 of the first word of the input destination file for status. These bits tell the adapter-mode controller channel the status of the supervisory controller and the integrity of the remote I/O communication link.

Scanner’s Output Image Table

Word		17	14	13	10	07	04	03	00
	0

Not used by adapter channel.

Adapter Channel’s Input Destination File

Example Integer File

15 12 11 08 07 04 03 00

Status of supervisory processor

When this Bit(s)	Is	It Indicates that the Adapter-Mode Controller
10 octal (8 decimal)	1	detects a communication failure or receives a reset command
		from the supervisory controller
		will be set if either bit 11 octal (9 decimal) or bit 15 octal (13
		decimal) is set
11 octal (9 decimal)	1	receives a reset command from the supervisory controller
		(controller in program or test mode)
13 octal (11 decimal)	1	detects that the supervisory controller has powered up; this bit
		is reset with the first communication from the supervisory
		controller
15 octal (13 decimal)	1	detects a communication failure (e.g., no communication
		activity on the remote I/O communication link within the last
		100 ms)

Publication 1785-UM012D-EN-P - July 2005