Bradley Smoker PLC-5 user manual Option Settings, DF1 Enqs

10-8Communicating with Devices on a Serial Link

This Field	Specifies	Configure by Doing the Following
Stop bits	Match the number of stop bits to the	Select 1, 1.5, or 2.
	device with which you are
	communicating

Control line	Select the mode in which the driver
	operates.

Select a method appropriate for your system’s configuration:

If you are not using a modem, choose NO HANDSHAKING.

If you are using a full-duplex modem, choose FULL-DUPLEX.

Option Settings

Duplicate detect	Whether you want the controller to	Select the desired setting.
	detect and ignore duplicate messages

ACK timeout	The amount of time you want the
	controller to wait for an
	acknowledgment to its message
	transmission

Enter a value 0-65535. Limits are defined in 20 ms intervals. For example to wait 40 ms, type 2. The recommended time elapse is 1 second. Specify 1 second by typing 50.

MSG appl	The number of seconds within which	Enter one of the following values:
timeout	the reply message must be received
	before the error bit is set on the	1:30-60 seconds
	message. The timer starts when the
	ladder program first initiates the	2:60-90 seconds
	message and is restarted if/when the
	ACK is received	3:90-120 seconds
		4:120-150 seconds
		5:150-180 seconds
		6:180-210 seconds
		7:210-240 seconds
NAK receive	The number of NAKs your controller	Enter a value 0-255.	The recommended setting is 3.
	can receive in response to a
	transmitted message
DF1 ENQS	The number of enquiries (ENQs) that	Enter a value 0-255.	The recommended setting is 3.
	you want the controller to send after
	an ACK timeout

Publication 1785-UM012D-EN-P - July 2005