Rockwell-automation 57C442 Data Highway Plus Interface Module Manual de usuario descargar pdf (Pagina 53)

G-1

Appendix G

This area contains statistics for the network as a whole and also for this station.

These values are returned to any remote station which requests them from this

station. This is also the format of data in counters returned from remote stations to

this station. These registers are read only.

40 LO Received ACK with bad CRC

Hl (not used)

41 LO Timeout expired with no ACKs received

HI Transmit re-tries exhausted

42 LO NAK/illegal protocol operation received

HI NAK/bad LSAP received

43 LO NAK/no memory received

Hl Received ACK/NAK too short

44 LO Received ACKJNAK too long

Hl Something other than ACK/NAK received

45 LO Token pass timeout

HI Token pass re-tries exhausted

46 LO Claim token sequence entered

HI Token claimed

47 LO Bad CRC in received frame

HI NAK/illegal protocol operation sent

48 LO NAK/bad LSAP sent

HI NAK/no memory sent

49 LO Received frame too small

HI Received frame too long

50 LO Received a re-transmission of a frame

HI Received frame aborted (line noise)

51 Message successfully sent

52 Message successfully received

53 Command successfully sent

54 Reply successfully received

55 Command successfully received

56 Reply successfully sent

57 LO Reply could not be sent

HI Number of active nodes

1 2 ... 48 49 50 51 52 53 54 55 56 57 58 ... 61 62

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Rockwell-automation 57C442 Data Highway Plus Interface Module Manual de usuario Pagina 53