GFK-0467K Appendix A Instruction Timing A-9
A
Table A-1. Instruction Timing-Continued
Function Enabled Disabled Increment Enabled Disabled Increment
Group Function 350/351/36x 350/351/36x 350/351/36x 352 352 352 Size
Search Less Than
INT 37 0 1.52 37 0 1.52 19
DINT 41 1 2.27 41 1 2.27 22
BYTE 37 0 1.41 37 0 1.41 19
WORD 37 0 1.52 37 0 1.52 19
Search Less Than/Equal
INT 38 0 1.48 38 0 1.48 19
DINT 40 1 2.30 40 1 2.30 22
BYTE 37 0 1.24 37 0 1.24 19
WORD 38 0 1.48 38 0 1.48 19
Conversion Convert to INT 19 1 – 19 1 – 10
Convert to BCD-4 21 1 – 21 1 – 10
Convert to REAL 27 0 – 21 0 �� 8
Convert to WORD 28 1 – 30 1 – 11
Truncate to INT 32 0 – 32 0 – 11
Truncate to DINT 63 0 – 31 0 – 11
Control Call a Subroutine 72 1 – 73 1 – 7
Do I/O 114 1 – 115 1 – 13
PID – ISA Algorithm* 162 34 – 162 34 – 16
PID – IND Algorithm* 146 34 – 146 34 – 16
End Instruction – – – – – – –
Service Request
#6 22 1 – 22 1 – 10
#7 (Read) 75 1 – 75 1 – 10
#7 (Set) 75 1 – 75 1 – 10
#14 121 1 – 121 1 – 10
#15 46 1 – 46 1 – 10
#16 36 1 – 36 1 – 10
#18 261 1 – 261 1 – 10
#23 426 0 – 426 0 – 10
#26//30** 2260 1 – 2260 1 – 10
#29 20 0 – 20 0 – 10
#43
Nested MCR/ENDMCR 1 1 – 1 1 – 4
Combined
Sequential Event
Recorder
*The PID times shown above are based on the 6.5 release of the 351 CPU.
**Service request #26/30 was measured using a high speed counter, 16-point output, in a 5-slot rack.
Notes:1. Time (in microseconds) is based on Release 7 of Logicmaster 90-30/20/Micro software for 350 and 360 Series CPUs.
2. For table functions, increment is in units of length specified.; for bit operation functions, microseconds/bit.; for data move
functions, microseconds/number of bits or words.
3. Enabled time for single length units of type %R, %AI, and %AQ.
4. COMMREQ time has been measured between CPU and HSC.
5. DOIO is the time to output values to discrete output module.
6. Where there is more than one possible case, the time indicated above represents the worst possible case.
7. For instructions that have an increment value, multiply the increment by (Length –1) and add that value to the base time.