Mitsubishi Electric MELSEC iQ-R-R00CPU - Page 670

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37 FUNCTIONS
37.15 Device/Label Memory Area Setting
Standard device area setting range
The number of points of each device used in standard programs and capacity in which the total number of device points can
be stored are set. Set the total number of device points within the device area range.
*1 This range is the maximum when the R120PSFCPU with an extended SRAM cassette (8MB) (NZ2MC-8MBSE) is used. The number of
points varies depending on the model of the SIL2 Process CPU and whether to use an extended SRAM cassette.
Safety device area setting range
The number of points of each safety device used in safety programs and capacity in which the total number of safety device
points can be stored are set. Set the total number of safety device points within the safety device area range.
Type Device name Symbol Range of use
*1
Increment for setting
Bit Input X X0 to X2FFF 
Output Y Y0 to Y2FFF 
Internal relay M M0 to M94674943 64 points
Link relay B B0 to B5A49FFF 64 points
Annunciator F F0 to F32767 64 points
Link special relay SB SB0 to SB5A49FFF 64 points
Edge relay V V0 to V32767 64 points
Latch relay L L0 to L32767 64 points
Word Timer T T0 to T5259711 32 points
Retentive timer ST ST0 to ST5259711 32 points
Long timer LT LT0 to LT1479295 1 point
Long retentive timer LST LST0 to LST1479295 1 point
Counter C C0 to C5259711 32 points
Long counter LC LC0 to LC2784543 32 points
Data register D D0 to D5917183 4 points
Link register W W0 to W5A49FF 4 points
Link special register SW SW0 to SW5A49FF 4 points
Type Device name Symbol Range of use Increment for setting
Bit Safety input SA\X SA\X0 to SA\X2FFF 
Safety output SA\Y SA\Y0 to SA\Y2FFF 
Safety internal relay SA\M SA\M0 to SA\M638975 64 points
Safety link relay SA\B SA\B0 to SA\B9BFFF 64 points
Word Safety timer SA\T SA\T0 to SA\T35487 32 points
Safety retentive timer SA\ST SA\ST0 to SA\ST35487 32 points
Safety counter SA\C SA\C0 to SA\C35487 32 points
Safety data register SA\D SA\D0 to SA\D39935 4 points
Safety link register SA\W SA\W0 to SA\W9BFF 4 points