The screenshot shows the information you see when the link is in 32Mbit Flex mode.
Up to 15 devices can be connected in a ring topology per link. In the signal tree on the left side, the links 1 – 15 below the ibaM-FO-2IO correspond to the address set by the rotary switch on the connected device.
Additional items are:
"Link" area
Time between telegrams
Time between two telegrams measured by the ibaM-FO-2IO module. It should be equal to the configured frame time.
Mode
Status of the connection mode:
Ring: One or more devices (cascade) are bidirectionally connected and the FO ring is closed.
Open chain: Only the fiber optic input is connected to a device. The output is not connected or the FO ring is interrupted
Mirror mode
Indicates whether mirror mode is disabled or enabled. If mirror mode is enabled, the display shows whether the module is configured as a master or slave system. For a description of mirror mode, see chapter Mirror mode with 32Mbit Flex.
Roundtrip delay
Telegram cycle in the closed FO ring. The time depends on the number of connected devices in the ring (approx. 2 µs per device). Due to the roundtrip delay the data of the connected devices might be captured asynchronously (up to one telegram cycle).
Frame time
Fixed cycle time the data frames are being sent. (Smallest timebase set for the connected devices. The timebase of all devices must be a multiple of the smallest timebase.)
Table
The table shows the cycle time and the data size of the respective channel:
Row 0: Ethernet channel Rows 1–15: connected devices with the corresponding address 1–15