[1] Read free memory size
Read free memory size.
[Write mode assignment]: None
[Communication format]
| Command | "+" | "C" | "L" | "A" | CMD | SUB | ATTR |
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| "+" | ACK | "C" | "L" | "A" | CMD | SUB |
| ATTR | MODE |
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| CMD |
| 43(H) | Function code |
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| SUB |
| 4D(H) | Sub code |
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| 03(H) | Program memory capacity: 3.5 k words |
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| 07(H) | Program memory capacity: 7.5 k words |
| left: See page | ||||||||
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| 07(H) | Program memory capacity: 15.5 k words |
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| 07(H) | Program memory capacity: 31.5 k words |
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Ex. When reading the amount of free program memory (up to 7.5 k words). The data in the cells are hexadecimal numbers.
Command | 2B | 43 | 4C | 41 | 43 | 4D | 00 |
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| "+" | "C" | "L" | "A" | CMD | SUB | ATTR |
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Response |
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2B | 00 | 43 | 4D | 41 | 43 | 4D | 00 | 07 |
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| ACK |
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| CMD | SUB |
| 7.5k word |
[2] Monitor TMR, CNT, and MD
| Read out the current value and attributed data from TMR, CNT, and MD in the specified area. | |||||||||||||||||||||||||||||||||
| [Write mode assignment]: None |
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| [Communication format] |
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10 |
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| "+" | "C" | "L" | "A" | CMD |
| SUB |
| ATTR |
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| TMR.NO. |
| N |
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| "+" | ACK | "C" | "L" | "A" |
| CMD |
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| SUB | ATTR |
| TMR.NO. |
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| TA1 |
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| TAN | |
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| D1 |
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Symbol | Data | Details | |
CMD | 42(H) | Function code | |
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SUB | 23(H) | Sub code | |
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| When JW20/JW20H is |
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| used: 000 to 777(8) |
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| TMR, CNT, MD number | |
TMR NO | When JW30H is used: | ||
0000 to 7777(8) | (in order of 2 bytes data, | ||
| (TMR, CNT, MD) | L and H.) | |
| 1000 to 1777(8) |
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| (TMR, CNT) |
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| Number of reading data | |
N | 0000 to 0100(8) | (in order of 2 bytes data, | |
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| L and H.) | |
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| Reading current value | |
D1 to DN | See the example | data | |
(Data 2 bytes x number | |||
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| of reading data) | |
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Symbol | Data |
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| 00(H) | Not used as TMR, |
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| CNT, or MD |
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| 01(H) | ZW/JW MD |
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| 02(H) | ZW CNT |
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| 04(H) | ZW TMR |
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TA1 | 08(H) | DTMR (BCD) |
| Data 1 bytes |
09(H) | DTMR (BIN) |
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to |
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TAN | 0A(H) | UTMR (BCD) |
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| 0B(H) | UTMR (BIN) |
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| 0C(H) | DCNT (BCD) |
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| 0D(H) | DCNT (BIN) |
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| 0E(H) | UCNT (BCD) |
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| 0F(H) | UCNT (BIN) |
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(See page
[Ex.] Read the current value of TMR, CNT, and MD at addresses 000 to 002(8) (The data in cells are in hexadecimal notation)
Command | 2B |
| 43 |
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| 41 | 42 | 23 | 00 | 00 |
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| 03 |
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| "+" |
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| CMD |
| SUB | ATTR | 000(8) |
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Response | 2B |
| 00 |
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| 4C | 41 | 42 | 23 | 00 |
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| ACK |
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| CMD | SUB | ATTR | 000(8) |
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| 65 |
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| 14 |
| 73 | 08 | 0C | 0E |
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| No. 000 |
| No. 001 |
| No. 002 | DTMR | DCNT | UCNT |
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| Current value: |
| Current value: |
| Current value: | 000 | 001 |
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| 002 |
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| 3865 |
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| 6032 | 7314 | (BCD) | (BCD) | (BCD) |
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