Specifications

Configuration Example for MELSEC System Q Profibus DP
Quick Start Guide for the MELSEC STlite Series 2 - 21
2.3.3 Saving devices
A digital output module with less than eight outputs (STL-DO4 or STL-RO2) will occupy a whole byte
although only two or four bits are used. (See allocation for the digital output module STL-DO4 in the
above figure.)
When, for example, another STL-DO4 is used in the configuration, this module can be entered as
*STL-DO4. The four bits belonging to this module will be entered in the same byte as the data for the
previous STL-DO4. Since the byte is now complete, any other STL-DO4 has to be entered as STL-DO4.
Fig. 2-19: Device monitor for the configuration with the analog modules mounted first
Fig. 2-20: The amount of used devices is reduced when the denomination "*" is used.
Slot 3: STL-DI8-V1
Slot 2: STL-AD2-V (Channel 1)
Slot 2: STL-AD2-V (Channel 2)
Not used
Slot 4: STL-DO4
Slot 1: STL-DA4-V1 (Channel 1)
Slot 1: STL-DA4-V1 (Channel 2)
Slot 1: STL-DA4-V1 (Channel 3)
Slot 1: STL-DA4-V1 (Channel 4)
Not used
This STL-DO4 occupies the bits 3 to 0 of byte n.
This STL-DO4 occupies the bits 7 to 4 of byte n.
This STL-DO4 occupies the bits 3 to 0 of byte n+1.