7 Application Instructions API 50-99 API 84 Operands: S : Start device for source data D : Device for storing the sum check result n : Number of data Explanations: 1. Range of n : 1 ~ 256 2. See the specifications of each model for their range of use. 3. Flag: M1161 (8/16 bit mode switch) 4. The sum check is used for ensuring the correctness of the data transmission. 5. 16-bit conversion mode: When M1161 = Off, the instruction is in 16-bit conversion mode. The instruction sums up n data (8 bits as a unit) from the start register designated in S and stores the results in the registers designated in D . The parity bits are stored in D + 1. 6. 8-bit conversion mode:
When M1161 = On, the instruction is in 8-bit conversion mode. The instruction sums up n data (8 bits as a unit; only 8 low bits are valid) from the start register designated in S and stores the results in the registers designated in D . The parity bits are stored in D + 1. Program Example 1: 1. M1161 = Off: The 16-bit conversion mode 2. When X0 = On, the instruction will sum up 6 data stored in the register designated in D0 (8 bits as a unit; n = 6 indicates D0 ~ D2 are designated) and store the result in the register designated in D100. The parity bits are stored in D101.
M1000 M1161 X0 DVP-PLC APPLICATION MANUAL 7-127 Mnemonic Operands Function CCD P Check Code Type OP Bit Devices Word Devices Program Steps X Y M S K H KnX KnY KnM KnS T C D E F CCD, CCDP: 7 steps S * * * * * * * D * * * * * n * * * PULSE 16-bit 32-bit EH3 SV2 ES EX SS EH3 ES EX SS SA SX SC EH SV EH3 SV2 ES EX SS SA S X SC EH SV SA SX SC EH SV SV2 CCD D0 D100 K6