RMS700 and TMS700 relays are simpler than the RMS7000 series.  Full details of the setting instructions are given in the commissioning instructions, available via the link below. The second link summarises the process. 
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The setting procedure for RMS7000 series relays is more complicated; see pages 19-21 of the Commissioning Instructions, available via the link below. 
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As with the RMS7000 and RMS700 series, the IDMT time setting is the time that the relay will operate in when the current is 10 times the IDMT pick-up. For example, if I> is set to 0.8, and the CT ratio is 150/1, then t(I>) is the time that the IDMT curve will operate in if 1,200A is flowing through the cable.