Yes, both P-link and PE-link cables have limits on the wiring length.

[P-link]
・Electrical transmission line
　Total length of electrical transmission line: 250m
　Min. length between stations: 1m
・Optical transmission line
    Max. length between stations: 3km (GI type)
    In cascade connection: Max. 16 optical converters (FNC360A-C20) can be connected.

[PE-link]
・Electrical transmission line
　Total length of electrical transmission line: 500m
　Min. length between stations: 1m
・Optical transmission line
　Max. length between stations: 3km (GI type)
　In cascade connection: Max. 64 optical converters (FNC360A-C20) can be connected.

* For the specifications of the optical converter (FNC360A-C20),

   refer to the user's manual 'P/PE-link Optical Converter (FEH584).'