477
Memory Areas Appendix C
AR Area
These bits mainly serve as flags related to SRM1 operation. These bits retain their status even after the SRM1
power supply has been turned off or when operation begins or stops.
SR 255 00 0.1-second clock pulse (0.05 second ON; 0.05 second OFF) ---
01 0.2-second clock pulse (0.1 second ON; 0.1 second OFF) ---
02 1.0-second clock pulse (0.5 second ON; 0.5 second OFF) ---
03 Instruction Execution Error (ER) Flag
Turns ON when an error occurs during execution of an instruction.
---
04 Carry (CY) Flag
Turns ON when there is a carry in the results of an instruction execution.
---
05 Greater Than (GR) Flag
Turns ON when the result of a comparison operation is “greater.”
---
06 Equals (EQ) Flag
Turns ON when the result of a comparison operation is “equal,” or when the result of an
instruction execution is 0.
---
07 Less Than (LE) Flag
Turns ON when the result of a comparison operation is “less.”
---
08 to 15 Not used.
Word(s) Bit(s) Function Page
AR 00,
AR 01
00 to 15 Not used.
AR 02 00 to 07 Not used.
08 to 11 Not used. (system use)
12 to 15 Not used.
AR 03 00 to 15 Not used.
AR 04 to
AR 07
00 to 15 Slave Status Flag ---
AR 08 00 to 03 RS-232C Error Code (1-digit number)
0: Normal completion
1: Parity error
2: Framing error
3: Overrun error
---
04 RS-232C Communications Error ---
05 RS-232C Transmission Enabled Flag
Valid only when host link, no protocol communications are used.
---
06 RS-232C Reception Completed Flag
Valid only when no protocol communications are used.
---
07 RS-232C Reception Overflow Flag
Valid only when no protocol communications are used.
---
08 to 11 Peripheral Device Error Code
0: Normal completion
1: Parity error
2: Frame error
3: Overrun error
101
12 Peripheral Device Error Flag
13 Peripheral Device Transmission Enabled Flag
Valid only when host link, no protocol communications are used.
---
14 Peripheral Device Reception Completed Flag
Valid only when no protocol communications are used.
---
15 Peripheral Device Reception Overflow Flag
Valid only when no protocol communications are used.
---
AR 09 00 to 15 RS-232C Reception Counter (4 digits BCD)
Valid only when no protocol communications are used.
---
AR 10 00 to 15 Peripheral Device Reception Counter (4 digits BCD)
Valid only when no protocol communications are used.
---
Word(s) Bit(s) Function Page
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