Curtis 1352 handleiding
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3 — CANopen COMMUNICATIONS
Curtis 1352 eXm Manual, June 2021
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pg. 16
EMERGENCY MESSAGES
Emergency messages are the second highest priority in CANopen and the highest priority that a
ancillary (like the eXm) can transmit. ese messages are sent sporadically whenever there is a change
of state in the eXm’s fault ags. An Emergency Message consists of 8 data bytes.
To prevent fast-changing fault bits from ooding the bus, a minimum time between messages can
be programmed.
Data bytes 1 and 2 dene the error category. e eXm will use the device-specic category (FFXXh)
per DS301. erefore the upper byte is FFh when a fault is present, and the lower byte is equal to the
Curtis fault code. When no faults are present and/or the last fault has just been cleared, the emergency
message will use the error code value of 0000h.
Data byte 3 is the CANopen-required error register. Curtis products dene this as 01h if there is a
fault present and 00h when all faults are clear.
Data bytes 4 through 8 dene the specic fault. e eXm will place the current 16-bit hour meter
(Object 3140h) into data bytes 4 and 5, with the MSB in byte 5. Note that bytes 6, 7, and 8 are not
used by the eXm and are always 000000h. See Diagnostics (section 6) for more detail.
Emergency Message Format indicating an error:
byte 1 byte 8
byte 1 byte 8
Error Category Hourmeter
Error Category Hourmeter
FFh
Curtis
Code
01h Object 3140h 000000h
0000h
00h
Object 3140h 000000h
Emergency Message Format indicating all error(s) cleared:
byte 1 byte 8
byte 1 byte 8
Error Category Hourmeter
Error Category Hourmeter
FFh
Curtis
Code
01h Object 3140h 000000h
0000h
00h
Object 3140h 000000h
HEARTBEAT
e heartbeat message is a very low priority message, periodically sent by each ancillary device on
the bus. e heartbeat message has a single byte of data and requires no response. Once the eXm is
in the Pre-Operational state, the next heartbeat will be issued and will continue until communication
is stopped.
e heartbeat message has only one data byte. e top bit is reserved and should be set to zero. e
bottom 7 bits hold the current NMT device state as dened previously.
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Productinformatie
| Merk | Curtis |
| Model | 1352 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 5176 MB |
