Digi International Inc XBEEPRO2 Manual Do Utilizador

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CH

Operating Channel. Read the channel number used for transmitting and receiving 

between RF modules. Uses 802.15.4 channel numbers. A value of 0 means the device 

has not joined a PAN and is not operating on any channel.

CRE

XBee
0, 0x0B - 0x1A 
(Channels 11-26)
XBee-PRO (S2)
0, 0x0B - 0x18 
(Channels 11-24)
XBee-PRO (S2B)
0, 0x0B - 0x19
(Channels 11-25)

[read-only]

DA

Force Disassociation. End device will immediately disassociate from a Coordinator (if 

associated) and reattempt to associate.

CRE

-

-

ID

Extended PAN ID. Set/read the 64-bit extended PAN ID. If set to 0, the coordinator will 

select a random extended PAN ID, and the router / end device will join any extended 

PAN ID. Changes to ID should be written to non-volatile memory using the WR 

command to preserve the ID setting if a power cycle occurs.

CRE

0 - 

0xFFFFFFFFFFFFFFFF

0

OP

Operating Extended PAN ID. Read the 64-bit extended PAN ID. The OP value reflects 

the operating extended PAN ID that the module is running on. If ID > 0, OP will equal ID. CRE

0x01 - 

0xFFFFFFFFFFFFFFFF

[read-only]

NH

Maximum Unicast Hops. Set / read the maximum hops limit. This limit sets the 

maximum broadcast hops value (BH) and determines the unicast timeout. The timeout 

is computed as (50 * NH) + 100 ms. The default unicast timeout of 1.6 seconds 

(NH=0x1E) is enough time for data and the acknowledgment to traverse about 8 hops.

CRE

0 - 0xFF

0x1E

BH

Broadcast Hops. Set/Read the maximum number of hops for each broadcast data 

transmission. Setting this to 0 will use the maximum number of hops.

CRE

0 - 0x1E

0

OI

Operating 16-bit PAN ID. Read the 16-bit PAN ID. The OI value reflects the actual 16-

bit PAN ID the module is running on.

CRE

0 - 0xFFFF

[read-only]

NT

Node Discovery Timeout. Set/Read the node discovery timeout. When the network 

discovery (ND) command is issued, the NT value is included in the transmission to 

provide all remote devices with a response timeout. Remote devices wait a random 

time, less than NT, before sending their response.

CRE

0x20 - 0xFF [x 100 msec] 0x3C (60d)

NO

Network Discovery options. Set/Read the options value for the network discovery 

command. The options bitfield value can change the behavior of the ND (network 

discovery) command and/or change what optional values are returned in any received 

ND responses or API node identification frames. Options include:
0x01 = Append DD value (to ND responses or API node identification frames)
002 = Local device sends ND response frame when ND is issued.

CRE

0 - 0x03 [bitfield]

0

SC

Scan Channels. Set/Read the list of channels to scan.
Coordinator - Bit field list of channels to choose from prior to starting network.
Router/End Device - Bit field list of channels that will be scanned to find a Coordinator/

Router to join.
Changes to SC should be written using WR command to preserve the SC setting if a 

power cycle occurs. 
Bit (Channel):

0 (0x0B)

4 (0x0F) 

8 (0x13)

12 (0x17)

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1 (0x0C)

5 (0x10) 

9 (0x14) 

13 (0x18)

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2 (0x0D)

6 (0x11) 

10 (0x15)

14 (0x19)

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3 (0x0E) 

7 (0x12)

11 (0x16)

15 (0x1A)

CRE

XBee
1 - 0xFFFF [bitfield]
XBee-PRO (S2)
1 - 0x3FFF [bitfield]
(bits 14, 15 not allowed)
XBee-PRO (S2B)
1-0x7FFF
(bit 15 is not allowed)

 1FFE 

SD

Scan Duration. Set/Read the scan duration exponent. Changes to SD should be 

written using WR command.

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Coordinator - Duration of the Active and Energy Scans (on each channel) that are 

used to determine an acceptable channel and Pan ID for the Coordinator to startup on.



Router / End Device - Duration of Active Scan (on each channel) used to locate an 

available Coordinator / Router to join during Association.
Scan Time is measured as:(# Channels to Scan) * (2 ^ SD) * 15.36ms - The number of 

channels to scan is determined by the SC parameter. The XBee can scan up to 16 

channels (SC = 0xFFFF).
Sample Scan Duration times (13 channel scan):

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If SD = 0, time = 0.200 sec

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SD = 2, time = 0.799 sec

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SD = 4, time = 3.190 sec

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SD = 6, time = 12.780 sec

Note: SD influences the time the MAC listens for beacons or runs an energy scan on a 

given channel. The SD time is not a good estimate of the router/end device joining time 

requirements. ZigBee joining adds additional overhead including beacon processing on 

each channel, sending a join request, etc. that extend the actual joining time.

CRE

0 - 7 [exponent]

3

ZS

ZigBee Stack Profile. Set / read the ZigBee stack profile value. This must be set the 

same on all devices that should join the same network.

CRE

0 - 2

0