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Link Master Functions
Descriptions for LM Parameters
LiveListStatusArrayVariable
A 32-byte variable, in which each bit represents the status of whether a device on the
same segment is live or not.
The leading bit corresponds to the device address 0x00, and final bit to 0xFF. The value
of LiveListStatusArrayVariable in the case where devices having the addresses 0x10
and 0x15 in the fieldbus segment is shown below.
MaxTokenHoldTimeArray
An 8 64 byte array variable, in which each set of 2 bytes represents the delegation time
(set as an octet time) assigned to a device. The delegation time denotes a time period
that is given to a device by means of a PT message sent from the LAS within each
token circulation cycle.
The leading 2 bytes correspond to the device address 0x00, and the final 2 bytes to the
device address 0xFF. Specify the subindex to access this parameter.
BootOperatFunctionalClass
Writing 1 to this parameter in a device and restarting the device causes the device to
start as a basic device. On the contrary, writing 2 to this parameter and restarting the
device causes the device to start as an LM.
CurrentLinkSettingRecord and ConfiguredLinkSettingsRecord
CurrentLinkSettingRecord indicates the bus parameter settings currently used.
ConfiguredLinkSettingsRecord indicates the bus parameter settings for use when the
device becomes the LAS. When a device is the LAS, its CurrentLinkSettingRecord and
ConfiguredLinkSettingsRecord have the same values.
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