5. CONFIGURATION
Configuration Description
Default
Value
Options
Mapping Disabling
Initial address used to dis-
able MODBUS relations
- 0 to 2147483644
Table 94: Device Configuration - MODBUS Master
Notes:
Instance Name: this field is the identifier of the device, which is checked according to IEC 61131-3, i.e. does not allow
spaces, special characters and start with numeral character. It’s limited in 24 characters.
Mapping Disabling: composed of 32 bits, used to disable, individually, the 32 MODBUS relations configured in Device
Mappings space. The relation is disabled when the bit, corresponding to relation, is equal to 1, otherwise, the mapping is
enabled. This field is limited by the size of outputs variables (%Q) addressable memory of each CPU, which can be found in
section Memory.
Default Value: the factory default value cannot be set to the Mapping Disabling field, because the creation of a Protocol
instance may be held at any time on application development. The MasterTool IEC XE software itself allocate a value, from
the range of output variables of direct representation (%Q), not used yet.
For further details on the Slave Address, Communication Time-out and Maximum Number of Retries parameters see notes
in section Devices Configuration – Symbolic Mapping configuration.
5.5.5.2.3. Mappings Configuration – Configuration for Direct Representation (%Q)
The MODBUS relations settings, viewed in the figures below, follow the parameters described in table below:
Figure 62: MODBUS Data Type
116
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