Expert Tab: Manual Mode

At a Glance

By selecting the manual mode, you have access to the following information:

The reversal and silence times,
The aperiodic bandwidths.

Illustration:

Aperiodic variables

The following table gives a description of the times:

Reference	Description
Silence time delay T0	This defines the maximum time between the transmission of the last byte of a frame and the transmission of the first byte of the following frame. This time is expressed in micro-seconds. Its value must be greater than the reversal time TR and less than 255.
Reversal time TR	This defines the minimum time between the transmission of the last byte of a frame and the transmission of the first byte of the following frame. This time is expressed in micro-seconds. Its value must be greater than or equal to 1 and less than the silence time T0.

NOTE: In the case of using an OZD FIP G3, it is essential to adjust the value of T0 = 255µs and TR = 30µs for all configurations.

Aperiodic Bandwidths

There are two types of exchange on a Fipio bus:

Exchanges of cyclic variables which are reserved for the process data,
Exchanges of aperiodic variables which concern the configuration of connected devices, the adjustment and the messaging.

A decrease or increase of the bandwidth of the aperiodic exchanges (Variables and Messages) slows down or accelerates the output of the configuration or adjustment variables which can circulate on the bus. The same applies to a decrease or increase of the aperiodic bandwidth of the messaging facility.

The following table gives a description of the aperiodic bandwidths:

Reference	Description
Aperiodic variables	This defines the output of the aperiodic variables which can circulate on the bus. This bandwidth is expressed in Kbits/s. Its value can be adjusted from 1 to 200 Kbits/s.
Messaging	This defines the output of the aperiodic messages which can circulate on the bus. This bandwidth is expressed in Kbits/s. Its value can be adjusted from 1 to 200 Kbits/s.

NOTE: An increase in the aperiodic bandwidth increases the network cycle time.