ProSoft Technology 5204SE-MNET-PDPMV1 - Manual (Page 36)

5204SE-MNET-PDPMV1 ♦ ProLinx Gateway Procedures
Modbus TCP/IP to PROFIBUS DP-V1 Pass-Through Master User Manual
Page 36 of 235
ProSoft Technology, Inc.
December 22, 2009
Watchdog Register
The Watchdog function allows the gateway to monitor a database register, the
Watchdog Register, to check for loss of communication with the non-PROFIBUS
communication protocol. If this function is used, the other gateway protocol is
expected to change the value in the Watchdog Register at an interval less than
the amount of time specified in the Watchdog Timeout parameter. If the value in
the Watchdog Register does not change within this amount of time, a
communication loss is assumed and the Watchdog function will set the
PROFIBUS outputs to the default value specified in the Watchdog Reset Value
parameter. To disable this function, set this parameter to a value of -1.
Watchdog Timeout
Sets the period of time (in 0.1s increments) for the gateway to wait for
communication loss detection. For example, set this parameter to 100 to set a
waiting period of 10 seconds. To disable this function, set this parameter to a
value of -1.
Watchdog Reset Value
Sets the value that will be sent to the PROFIBUS output byte registers upon
communication loss as detected by the Watchdog function. To disable this
function, set this parameter to a value of -1.
PLC Control Buffer Start
0 for M340 processors only
1 to 32000 for Quantum processors only
This parameter serves two purposes. First, it tells the gateway what kind of
processor will be used. This affects what kind of export files are created by the
Application Communication Logic (ACL) features of the gateway. If set to zero
(0), export files will be created for M340 processors. If set to a non-zero value in
the range of 1 to 32000, export files will be created for Quantum processors.
Second, it tells the gateway what addresses to show in the Unity Passthru
Memory Map for Quantum communication control and data buffers when a
Quantum processor is used.
Set this parameter to zero (0) when the module will be used with an M340
processor, which does not require special communication control and data buffer
space be reserved in processor memory. No Control Buffer information will be
shown in the Unity Passthru Memory Map when this parameter is set to zero (0).