microSYST migra MPB CAN, User Manual, Page: 44 / 71

migra MPB CAN
Large Format Graphics Compatible LED Display with CANopen Interface
Page 44
microSYST Systemelectronic GmbH, Am Gewerbepark 11, 92670 Windischeschenbach
+49 9681 91960-0, +49 9681 91960-10, info@microsyst.de, www.microsyst.de
3.12.3.2 Nodeguard Frame
COB ID B.1 B.2 B.3 B.4 B.5 B.6 B.7 B.8
Receive 700
h
+
node ID
RTR=1
DLC=1
- - - - - - - -
Response 700
h
+
node ID
RTR=0
DLC=1
128 x toggle bit (0 or 1) +
current operating state:
4:
STOPPED
5: OPERATIONAL
127: PRE-OPERATIONAL
- - - - - - -
The “nodeguard” frame may only be used when “heartbeat” is inactive
(“producer heartbeat time” = object 1017
h
= 0).
When “life-guarding” is activated (“guard time” = object 100C
h
> 0 and “life
time factor” = object 100D
h
> 0), a timer is started each time a nodeguard
request occurs, which automatically switches the device to the pre-
operational state after “life time” has elapsed (“guard time” x “life time factor”
ms), if the next nodeguard request is not received on time.
3.12.3.3 Heartbeat Frame
COB ID B.1 B.2 B.3 B.4 B.5 B.6 B.7 B.8
Response 700
h
+
node ID
RTR=0
DLC=1
Current operating state:
0:
BOOTUP
4: STOPPED
5: OPERATIONAL
127: PRE-OPERATIONAL
- - - - - - -
The “boot-up” frame is transmitted after the device is switched on (operating
state = “BOOTUP”).
After selecting the setting “producer heartbeat time” = object 1017
h
(unit of
measure: ms), the device starts transmitting the heartbeat frame in a cyclical
fashion.