Panasonic FP-X0 L14R User Manual page 97

6.6.2 Setting of Unit Numbers
By default, the unit number for the communication port is set to 1 in the system registers.
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In a PC(PLC) link that connects multiple PLCs on the same transmission line, the unit number must be
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set in order to identify the different PLCs. The unit number is specified either by using the SYS1
instruction or the system register.
Precautions on the unit number settings
Unit numbers are the numbers to identify the different PLCs on the same network. The same number
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must not be used for more than one PLC on the same network.
Unit numbers should be set sequentially and consecutively, starting from 1, with no breaks between
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them. If there is a missing unit number, the transmission time will be longer.
If fewer than 16 units are linked, the transmission time can be shortened by setting the largest unit
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number in system register no. 47.
The prioriry order for unit number settings is as follows;
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1. SYS1 insturction
2. System registers
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