Lika EMC58 MT, User Manual, Page: 52 / 104

EM58 – HS58 - HM58 MODBUS TCP/IP
Watchdog timeout [82]
[81, Unsigned16, rw]
For safety reasons, while the encoder is on, a continuous data exchange
between the Master and the Slave has to be planned in order to be sure that the
communication is always active; this is intended to prevent danger situations
from arising in case of failures in the communication network.
For this purpose the Watchdog function is implemented and can be enabled. The
Watchdog function is a safety timer that uses a time-out to detect loop or
deadlock conditions. For instance, should the communication be cut off while a
command is still active and running, the Watchdog safety system immediately
takes action and commands an alarm to be triggered.
This register is used to disable/enable the Watchdog function and further to set
the timeout value expressed in milliseconds. Setting the register to 0 causes the
Watchdog function to be disabled. Any value greater than 0 enables the
Watchdog function and sets the Watchdog timeout. When the Watchdog
function is enabled, if the device does not receive a message from the Server
within the set time, the system forces the encoder to exit the network
participation and shift to the
EXCEPTION
state. Furthermore the NS Network
State Error LED starts flashing red.
Default = 0 (min. = 0, max. = 65535)
NOTE
As soon as the Watchdog function is enabled (
Watchdog timeout [82]
> 0),
one MODBUS command at least must be sent in order to activate the timeout.
NOTE
The
Watchdog timeout [82]
value is immediately saved in the memory as soon
as it is set; thus you are not required to save it by means of the the
Save
parameters
function.
Current position [95-96]
[94-95, Unsigned16, ro]
The
Current position [1-2]
input registers are also available as holding
registers at the address 94-95 and accessible by using the
03 Read Holding
Registers
function code. For any information refer to page 68.
Speed value [97-98]
[96-97, Signed16, ro]
The
Speed value [3-4]
input registers are also available as holding registers at
the address 96-97 and accessible by using the
03 Read Holding Registers
function code. For any information refer to page 68.
MAN EM58_HS58_HM58 MT E 1.1.odt Programming parameters 52 of 104