Momentum Modbus Plus 170 PNT Series Guia do Utilizador Página 76

  • Descarregar
  • Adicionar aos meus manuais
  • Imprimir
  • Página
    / 376
  • Índice
  • MARCADORES
  • Avaliado. / 5. Com base em avaliações de clientes
Vista de página 75
Overview of Momentum Option Adapters
76
870USE10110 July 2004
LED Indicators This option adapter has three LED indicators. Their functions are described in the
table below.
MB+ ACT Flash
Patterns
This table provides the patterns that the MB+ ACT indicator will flash to indicate the
status of the Modbus Plus node.
LED Status Function
MB+ ACT Green Indicates activity on one or both of the Modbus Plus ports (see
the flash pattern table below)
Off No activity on either Modbus Plus port
ERR A Red Indicates a communications failure on Modbus Plus port A*
Off No problems detected on Modbus Plus port A
ERR B Red Indicates a communications failure on Modbus Plus port B*
Off No problems detected on Modbus Plus port B
* If you are not using redundant cabling on the Modbus Plus link (i.e., if only one of the ports
is being used) the Error LED for the unused port will be on constantly when Modbus Plus
communication occurs on the network.
Pattern Meaning
6 flashes/s This is the normal operating state for the node. It is receiving and passing
the network token. All nodes on a healthy network flash this pattern.
1 flash/s The node is offline just after power-up or after exiting the 6 flashes/s
mode. In this state, the node monitors the network and builds a table of
active nodes. After being in this state for 5s, the node attempts to go to its
normal operating state, indicated by 6 flashes/s.
2 flashes, then
OFF for 2s
The node detects the token being passed among the other nodes, but
never receives the token. Check the network for an open circuit or
defective termination.
3 flashes, then
OFF for 1.7s
The node is not detecting any tokens being passed among the other
nodes. It periodically claims the token but cannot find another node to
which to pass it. Check the network for an open circuit or defective
termination.
4 flashes, then
OFF for 1.4s
The node has detected a valid message from a node using a network
address identical to its own address. The node remains in this state for as
long as it continues to detect the duplicate address. If the duplicate
address is not detected for 5s, the node changes to its 1flash/s mode.
ON Indicates an invalid node address.
OFF Possible fault with Modbus Plus option adapter.
Vista de página 75
1 2 ... 71 72 73 74 75 76 77 78 79 80 81 ... 375 376

Comentários a estes Manuais

Sem comentários