Mitsubishi Electric R60AD8-G User Manual page 279

Setting procedure
To use the SIL2 A/D conversion function, the following module parameter settings and a program by the SIL2 diagnostic FB
library are required.
• "SIL2 A/D conversion cycle setting"
• "Transmission interval monitoring time"
■"SIL2 A/D conversion cycle setting"
Set the time required for conducting the following: match the digital operation values from the A/D conversion by the R60AD8-
G (Main) and R60AD8-G (Sub) by double input discrepancy detection function; store the mean value in a safety device
specified by the SIL2 diagnostic FB library.
[Navigation window]  [Parameter]  [Module Information]  [R60AD8-G(S2M)]  [Module Parameter]  [Application
setting]  [SIL2 A/D conversion cycle setting]
Item
SIL2 A/D conversion cycle setting
Use the following formula to calculate the setting value. Set the calculated value or a higher value.
• (SCmst  10) + (RM  3) + (LS  16) + 372ms + (12ms  CHad) + (SM  2)
The following table lists symbols.
Symbol Description
SCmst Safety cycle time of the master station (safety station)
RM Safety refresh monitoring time
LS Link scan time
CHad Number of A/D conversion enabled channels
SM Sequence scan time of the master station (safety station)
*1 For details on the safety cycle time, refer to the following.
 MELSEC iQ-R CPU Module User's Manual (Application)
*2 For details on the safety refresh monitoring time, refer to the following.
 MELSEC iQ-R CC-Link IE Field Network User's Manual (Application)
Ex.
Calculation example with the following conditions:
• SCmst: 50ms
• RM: 400ms
• LS: 2ms
• CHad: 8 (A/D conversion enabled for all channels)
• SM: 2ms
(SCmst  10) + (RM  3) + (LS  16) + 372ms + (12ms  CHad) + (SM  2)
= (50ms  10) + (400ms  3) + (2ms  16) + 372ms + (12ms  8) + (2ms  2)
= 2204ms
With the above conditions, set "SIL2 A/D conversion cycle setting" to 2204(ms) or higher.
Setting range
700 to 32767 (ms)
*1
*2
10 FUNCTIONS
10.8 SIL2 A/D Conversion Function
10
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