User Manual

AT commands Networking and security commands

XBee/XBee-PRO S2C 802.15.4 RF Module User Guide

Bit Parameter

7 0x12

8 0x13

9 0x14

10 0x15

11 0x16

12 0x17

13 0x18 (not available on XBee-PRO)

14 0x19 (not available on XBee-PRO)

15 0x1A (not available on XBee-PRO)

Default

0x1FFE

SD (Scan Duration)

Sets or reads the scan duration exponent.

Coordinator: If you set the ReassignPANID option on the Coordinator (refer to A2 (Coordinator

Association) on page 69), SD determines the length of time the Coordinator scans channels to locate

existing PANs. If you set the ReassignChannel option, SD determines how long the Coordinator

performs an Energy Scan to determine which channel it will operate on.

End Device: Duration of Active Scan during Association.

Scan Time is measured as:

(# of channels to scan] * (2 ^ SD) * 15.36ms)

Use the SC (Scan Channels) command to set the number of channels to scan. The XBee can scan up to

16 channels (SC = 0xFFFF). The XBee-PRO can scan up to 13 channels (SC = 0x3FFE).

Example

The following table shows the results for a thirteen channel scan.

SD setting Time

0 0.18 s

2 0.74 s

4 2.95 s

6 11.80 s

8 47.19 s

10 3.15 min

12 12.58 min

14 50.33 min