ICX35-HWC ♦ Industrial Cellular Gateway
EtherNet/IP and SMS Text Messaging
3G/4G LTE
User Manual
ProSoft Technology, Inc.
Page 88 of 127
Warning: The ICX35-HWC should not receive SMS messages faster than once every 30 seconds;
otherwise it may repeatedly disconnect from the cellular network.
Warning: The ICX35-HWC must not buffer more than 500 received SMS messages before
transmission to RSLogix 5000; otherwise, new incoming messages will be discarded.
Check the number of free slots in the Rx buffer by continuously monitoring the
SMS_MSGs_Rx_Free_Buffer_Counter
tag (Starting value is 500). The ICX35-HWC
may buffer SMS messages in case the messages are received from the cellular
network faster than the PLC polling rate. If a receiving PLC is offline during the
sending of more than 250 SMS messages, upon reconnection, it will only poll the last
250 received SMS messages.
For reliable communications, the number of free slots in the ICX35-HWC receive
buffer should be greater than ‘0’. Otherwise, messages received when the buffer is
full are discarded.
6.3.5
Clearing SMS Text Messages from the ICX35-HWC
This controller tag clears all SMS messages within the ICX35-HWC.
Note: This feature requires ICX35-HWC v1.4.78 firmware or later.
Enter ‘
1
’ in the
ICX35.CONTROL.Clear_SMS
controller tag and press
E
NTER
.
Note: Once triggered, it does not immediately clear the ICX35.SMS.READ.Message array. To do this,
you must trigger the ICX35.CONTROL.Read_SMS controller tag after the SMS text messages have
been cleared within the ICX35-HWC.