State Relay [S]; Numbers Of State Relays - Mitsubishi Electric MELSEC-Q Structured Programming Manual

FXCPU Structured Programming Manual
[Device & Common]
2.4

State Relay [S]

State relays (S) are important devices to simply program stepping type process control, and are combined
with the step ladder instruction STL.
2.4.1

Numbers of state relays

The table below shows state relay (S) numbers. (Numbers are assigned in decimal.)
1. FX /FX /FX
3S 3G
FX /FX
3U 3UC
PLC
FX /FX
3G 3GC
PLC
FX 3S PLC
*1. This area is not latched (backed up). It can be changed to the latched (backed-up) area by parameter
setting.
*2. This area is latched (backed up). It can be changed to the non-latched (non-backed-up) area by
parameter setting.
*3. The characteristics of latch (backup) cannot be changed using parameters.
*4. They can be changed to the latched (battery backed-up) type using parameters while an optional
battery is attached. However, the latched area cannot be set.
2. FX /FX /FX
1S 1N
FX PLC
1S
FX /FX
1N 1NC
PLC
FX /FX
2N 2NC
PLC
(S0 to S9 are provided
*1. This area is not latched (backed up). It can be changed to the latched (backed-up) area by parameter
setting.
*2. This area is latched (backed up). It can be changed to the non-latched (non-backed-up) area by
parameter setting.
*3. The characteristics of latch (backup) cannot be changed using parameters.
44
/FX /FX PLCs
3GC 3U 3UC
Initial state type General type
S0 to S499
S0 to S9 500 points
(S0 to S9 are provided
*1
10 points
for the initial state.)
Initial state (EEPROM Latched (EEPROM
backed-up) type backed-up) type
S0 to S9
10 points
Initial state (EEPROM Fixed latched (EEPROM
backed-up) type
S0 to S9
10 points
/FX /FX PLCs
1NC 2N 2NC
Latched (battery
General type
backed-up) type
-
-
S0 to S499
S500 to S899
*1
500 points
400 points
for the initial state.)
Latched (battery
backed-up) type
S500 to S899
400 points
*1
Annunciator (EEPROM
backed-up) type
S10 to S899 S900 to S999
890 points 100 points
General type
backed-up) type
S10 to S127 S128 to S255
118 points
Fixed latched (backed-up) type
EEPROM backed-up
S0 to S127
*3
128 points
-
(S0 to S9 are provided
for the initial state.)
S0 to S127
*3
128 points
-
(S0 to S9 are provided
for the initial state.)
-
*2
Fixed latched (battery
backed-up) type
S1000 to S4095
*2 *3
3096 points
General type
S1000 to S4095
3096 points
128 points
Capacitor backed-up
-
S128 to S999
*3
872 points
-
2 Devices in Detail
2.4 State Relay [S]
Annunciator type
S900 to S999
*2
100 points
*4
Annunciator type
-
-
S900 to S999
*2
100 points