ABB SLTA Option Card Serial LonTalk, Техническое справочное руководство

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20 ABB Automation
1MRS 750107-MUM Serial LonTalk

Adapter
Technical Reference Manual
SLTA Option Card
Appendix A
Default values of communication parameters and buffers for the SLTA option card.
These values are set during manufacturing and they are stored in the EEPROM
memory of the Neuron chip. The values may be read and written over the
L
ON
W
ORKS
network using Read Memory and Write Memory network management
messages addressed to the SLTA option card (for more details see L
ON
W
ORKS
Technology Device Data chapter A6: The configuration structure).
Table 1: Configuration structure fields and values programmed
during manufacturing
Field of a structure Value Offset / # of bits Remarks
channel_id 0x0000 0x0016 / 16
location 0 0x02 / 6*8 set during installation
comm_clock 0 0x08 / 5 = input_clock / 8: 1,25 Mbit/s
input_clock 5 / 3 = 10 Mhz
comm_type 1 0x09 / 3 = single_ended
comm_pin_dir 0x0E / 5 = dir.mode - single_ended
preamble_length 6 0x0A / 8 = 240
µ
s
packet_cycle 4 0x0B / 8 = 4 ms
beta2_control 0 0x0C / 8
xmit_interpacket 0 0x0D / 8
recv_interpacket 0 0x0E / 8
node_priority 0 0x0F / 8 = no priority slot allocated
channel_priorities 30 0x10 / 8 number of priority slots
collision_detect 1 0x11 / 1 = enabled
bit_sync_threshold 0 / 2 = number of bits: 4
filter 0 / 2
hysteresis 0 / 3
cd_to_end_packet 1 0x12 / 6
cd_tail 1 / 1
cd_preamble 0 / 1
non_group_timer 0 0x18 / 4 = 128 ms
nm_auth 0 / 1 = no authentication
preemption timeout 5 / 3 = 10 sec
Table 2: Buffer settings
Rcv transaction count 7
App buf out size
App buf in size 66
66
Net buf out size
Net buf in size 66
66
Net buf priority count
App buf priority count 5
5
App buf out count
App buf in count 15
191
Net buf out count
Net buf in count 15
127