Device Description HG G-71910-C | English, Revision 03 | Date: 17.09.2019
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Chapter 5 – Components and Operation
5.2.2.4.4 PDO_2
PDO_2 is sent with Identifier Node Address. It contains 8 byte according
to the following table:
5.2.2.4.5 Heartbeat
The device supports the heartbeat mode. If a heartbeat time > 0 is entered in the
CAN menu with each end of the heartbeat timer, the device mode is transmitted via
the identifier 0x700 + node address.
5.2.2.4.6 Node-Guarding
If the heartbeat time is set to 0, the device answers to a remote-transmission-re
-
quest (RTR) of the identifier (0x700 + node address) with the system status (see Ta
ble 16 above) in which the highest bit changes. The device does not check for the
regular input of the RTR frames.
5.2.2.4.7 Description Of The Service Data Objects (SDOs)
For accessing the object directory, a SDO is used. It is transferred with a confirma
-
tion, that means that each reception is confirmed with a message. The identifiers for
read and write access are:
Table 14
Meaning of the PDO_1 data bytes
Value
Type
Value range (Hex) Meaning
Code_0
Unsigned 8 0..0xff
Low-order code bits 0..7
Code_1
Unsigned 8 0..0xff
Code bits 8..15
Code_2
Unsigned 8 0..0xff
Code bits 16..23
Code_3
Unsigned 8 0..0xff
High-order code bits 24..31
Status_0
Unsigned 8 ./.
Low-order status bits 0..7 *)
Status_1
Unsigned 8 ./.
High-order status bits 8..15 *)
*) The meaning of the status bits is explained in Table 7 on page 19.
Table 15
Meaning of PDO_2 data bytes
Value
Type
Value range (Hex)
Meaning
Status
Unsigned 16 0 ... 0xff
Status bits *)
Uref
Unsigned 16 0 ... 1023
Voltage of the reference channel
in units
Upos
Signed 16
0 ... ±1023
Voltage of the positioning chan
-
nel in units
N_READ Unsigned 8 0 ... 255
Number of code readings
N_ERR
Unsigned 8 0 ... 255
Number of reading errors
*) The meaning of the status bits is explained in Table 7 on page 19.
Table 16
Codes of the Heartbeat mode
Device mode
Code
stopped
0x04
preoperational
0x7f
operational
0x05