Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G - Manual (Page 78)

<APPENDIX 5. LINK MASTER FUNCTIONS>
A-29
IM 11M12D01-61E
A5.5.2 Descriptions for LM Parameters
The following describes LM parameters of a AV550G transmitter.
NOTE: Do not turn off the power to the AV550G for 60 seconds after making a change to its parameter settings.
(1) DlmeLinkMasterCapabilitiesVariable
(2) DlmeLinkMasterInfoRecord
(3) PrimaryLinkMasterFlagVariable
Explicitly declares the LAS. Writing “true” (0xFF) to this parameter in a device causes that device
to attempt to become the LAS. However, a request of writing “true” to this parameter in a device is
rejected if the value of the same parameter in any other device that has a smaller node address within
the same segment is true.
(4) 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.
Meaning
Bit
Position
Value Description
1
0
0
LAS Schedule in
Non-volatile Memory
Last Values Record
Supported
Link Master Statistics
Record Supported
Whether the LAS schedule can (= 1) or cannot (= 0)
be saved to the non-volatile memory
Whether to support (= 1) or not to support (= 0)
LastValuesRecord.
Whether to support (= 1) or not to support (= 0)
DlmeLinkMasterStatisticsRecord.
B3: 0x04
B2: 0x02
B1: 0x01
TA0606.ai
Element
Sub-
index
Description
Size
[bytes]
1
2
2
2
2
4
2
2 V(MSO)
V(DMDT)
V(DTHT)
V(TTRT)
V(LTHT)
V(TDP)
V(MICD)
V(LDDP) MaxSchedulingOverhead
DefMinTokenDelegTime
DefTokenHoldTime
TargetTokenRotTime
LinkMaintTokHoldTime
TimeDistributionPeriod
MaximumInactivityToClaimLasDelay
LasDatabaseStatusSpduDistributionPeriod 1
2
3
4
5
6
7
8
TA0607.ai
0x00 00 84 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
Bit correspondences: 0 0 0 0 0 0 0 0 0 0 0
0Ч00
0 0 0 0 0 1 0 0 0 0 1 0 0...
0Ч10 0Ч15 F0600E.ai