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APPX
Appendix 8 Buffer Memory
SIL2 function module and safety function module
The following table lists buffer memory addresses of the SIL2 function module and safety function module.
Address Name Data stored
Un\G0 Latest self-diagnostics error code Error codes are stored in a hexadecimal value when the self-diagnostics detects an error.
Un\G1 Latest self-diagnostics error time The year value (four digits) for the date/time when Un\G0 data was updated is stored as a
BIN code.
Un\G2 The month value for the date/time when Un\G0 data was updated is stored as a BIN code.
Un\G3 The day value for the date/time when Un\G0 data was updated is stored as a BIN code.
Un\G4 The hour value for the date/time when Un\G0 data was updated is stored as a BIN code.
Un\G5 The minute value for the date/time when Un\G0 data was updated is stored as a BIN code.
Un\G6 The second value for the date/time when Un\G0 data was updated is stored as a BIN code.
Un\G7 The day value for the date/time when Un\G0 data was updated is stored as a BIN code. (0:
Sun, 1: Mon, 2: Tue, 3: Wed, 4: Thu, 5: Fri, 6: Sat)
Un\G10 to Un\G25 Self-diagnostics error code 1 to 16 The maximum of 16 types of error codes are stored into Un\G10 onwards when the self-
diagnostics detects an error. (The same error code as one already stored in Un\G10
onwards is not stored.) The 17th error code onwards are not stored. Also, error codes are
not stored when 16 types of error codes have already been stored in Un\G10 to Un\G25.
Un\G50 Error clear Set 1 in Un\G50 to clear the error. After the error is cleared, 0 is automatically set in Un\G50
by the system.
Un\G52 LED status This buffer memory area stores the information that indicates the LED status (0: off, 1: on,
2: flashing) in the following bit patterns.
• b0 to b1: READY
• b2 to b3: ERROR
• b4 to b5: PROGRAM RUN
• b6 to b7: SAFETY COM RUN
• b8 to b9: SAFETY COM ERR
• b10 to b11: TEST
Un\G54 Safety cycle processing time
execution cycle error count
The detected number of times that cycles for which safety cycle processing was not
executed is stored.
Un\G60 Pair version The pair version is stored in decimal notation.
Un\G62 Current safety cycle time (ms unit) • The current safety cycle processing time is stored. (The time is measured in 1 s units.)
Un\G62: The ms part is stored. (Range: 0 to 65535)
Un\G63: The .s part is stored. (Range: 0 to 999)
• The measurement is stored even when the status is STOP.
Un\G63 Current safety cycle time (s unit)
Un\G64 Minimum safety cycle time (ms unit) • The minimum safety cycle processing time value is stored. (The time is measured in 1 s
units.)
Un\G64: The ms part is stored. (Range: 0 to 65535)
Un\G65: The .s part is stored. (Range: 0 to 999)
• The measurement is stored even when the status is STOP.
Un\G65 Minimum safety cycle time (s unit)
Un\G66 Maximum safety cycle time (ms unit) • The maximum safety cycle processing time value is stored. (The time is measured in 1 s
units.)
Un\G66: The ms part is stored. (Range: 0 to 65535)
Un\G67: The .s part is stored. (Range: 0 to 999)
• The measurement is stored even when the status is STOP.
Un\G67 Maximum safety cycle time (s unit)
Un\G70
*2
Firmware version The firmware version is stored.
Un\G80 Detailed information 1 information
category
The detailed information 1 information category code is stored.
Un\G81 to Un\G111 Detailed information 1 • Detailed information 1 corresponding to the error code (Un\G0) is stored.
• The stored information contains the following eight types.
0: N/A
1: Program position information
2: Drive number and file name
4: Parameter information
5: System configuration information
6: Number of times information
7: Time information
24: Failure information
34: Continuous RUN prevention setting in TEST MODE
• The type of detailed information 1 can be obtained using Un\G80. (The bit patterns for
values in the "Detailed information 1 information category code" stored in Un\G80
correspond to those in SD81 to SD111.) ( Page 833 List of Special Register Areas)
Un\G112 Detailed information 2 information
category
The detailed information 2 information category code is stored.
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